Update <hgroup> children after first <h#> to <p>, ref. new HTML standard

src/epub/text/chapter-1.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-1" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">I</h2>
-				<h3 epub:type="title">Toward the Eternal Fires</h3>
+				<p epub:type="title">Toward the Eternal Fires</p>
 			</hgroup>
 			<p>I was born in Connecticut about thirty years ago. My name is David Innes. My father was a wealthy mine owner. When I was nineteen he died. All his property was to be mine when I had attained my majority⁠—provided that I had devoted the two years intervening in close application to the great business I was to inherit.</p>
 			<p>I did my best to fulfil the last wishes of my parent⁠—not because of the inheritance, but because I loved and honored my father. For six months I toiled in the mines and in the counting-rooms, for I wished to know every minute detail of the business.</p>

src/epub/text/chapter-10.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-10" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">X</h2>
-				<h3 epub:type="title">Phutra Again</h3>
+				<p epub:type="title">Phutra Again</p>
 			</hgroup>
 			<p>I hastened to the cliff edge above Ja and helped him to a secure footing. He would not listen to any thanks for his attempt to save me, which had come so near miscarrying.</p>
 			<p>“I had given you up for lost when you tumbled into the Mahar temple,” he said, “for not even I could save you from their clutches, and you may imagine my surprise when on seeing a canoe dragged up upon the beach of the mainland I discovered your own footprints in the sand beside it.</p>

src/epub/text/chapter-11.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-11" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">XI</h2>
-				<h3 epub:type="title">Four Dead Mahars</h3>
+				<p epub:type="title">Four Dead Mahars</p>
 			</hgroup>
 			<p>A moment later I was standing before a dozen Mahars⁠—the social investigators of Phutra. They asked me many questions, through a Sagoth interpreter. I answered them all truthfully. They seemed particularly interested in my account of the outer earth and the strange vehicle which had brought Perry and me to Pellucidar. I thought that I had convinced them, and after they had sat in silence for a long time following my examination, I expected to be ordered returned to my quarters.</p>
 			<p>During this apparent silence they were debating through the medium of strange, unspoken language the merits of my tale. At last the head of the tribunal communicated the result of their conference to the officer in charge of the Sagoth guard.</p>

src/epub/text/chapter-12.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-12" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">XII</h2>
-				<h3 epub:type="title">Pursuit</h3>
+				<p epub:type="title">Pursuit</p>
 			</hgroup>
 			<p>For an instant I stood there thinking of her, and then, with a sigh, I tucked the book in the thong that supported my loin cloth, and turned to leave the apartment. At the bottom of the corridor which leads aloft from the lower chambers I whistled in accordance with the prearranged signal which was to announce to Perry and Ghak that I had been successful. A moment later they stood beside me, and to my surprise I saw that Hooja the Sly One accompanied them.</p>
 			<p>“He joined us,” explained Perry, “and would not be denied. The fellow is a fox. He scents escape, and rather than be thwarted of our chance now I told him that I would bring him to you, and let you decide whether he might accompany us.”</p>

src/epub/text/chapter-13.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-13" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">XIII</h2>
-				<h3 epub:type="title">The Sly One</h3>
+				<p epub:type="title">The Sly One</p>
 			</hgroup>
 			<p>The Sagoths were gaining on us rapidly, for once they had sighted us they had greatly increased their speed. On and on we stumbled up the narrow canyon that Ghak had chosen to approach the heights of Sari. On either side rose precipitous cliffs of gorgeous, particolored rock, while beneath our feet a thick mountain grass formed a soft and noiseless carpet. Since we had entered the canyon we had had no glimpse of our pursuers, and I was commencing to hope that they had lost our trail and that we would reach the now rapidly nearing cliffs in time to scale them before we should be overtaken.</p>
 			<p>Ahead we neither saw nor heard any sign which might betoken the success of Hooja’s mission. By now he should have reached the outposts of the Sarians, and we should at least hear the savage cries of the tribesmen as they swarmed to arms in answer to their king’s appeal for succor. In another moment the frowning cliffs ahead should be black with primeval warriors. But nothing of the kind happened⁠—as a matter of fact the Sly One had betrayed us. At the moment that we expected to see Sarian spearmen charging to our relief at Hooja’s back, the craven traitor was sneaking around the outskirts of the nearest Sarian village, that he might come up from the other side when it was too late to save us, claiming that he had become lost among the mountains.</p>

src/epub/text/chapter-14.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-14" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">XIV</h2>
-				<h3 epub:type="title">The Garden of Eden</h3>
+				<p epub:type="title">The Garden of Eden</p>
 			</hgroup>
 			<p>With no heavenly guide, it is little wonder that I became confused and lost in the labyrinthine maze of those mighty hills. What, in reality, I did was to pass entirely through them and come out above the valley upon the farther side. I know that I wandered for a long time, until tired and hungry I came upon a small cave in the face of the limestone formation which had taken the place of the granite farther back.</p>
 			<p>The cave which took my fancy lay halfway up the precipitous side of a lofty cliff. The way to it was such that I knew no extremely formidable beast could frequent it, nor was it large enough to make a comfortable habitat for any but the smaller mammals or reptiles. Yet it was with the utmost caution that I crawled within its dark interior.</p>

src/epub/text/chapter-15.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-15" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">XV</h2>
-				<h3 epub:type="title">Back to Earth</h3>
+				<p epub:type="title">Back to Earth</p>
 			</hgroup>
 			<p>We crossed the river and passed through the mountains beyond, and finally we came out upon a great level plain which stretched away as far as the eye could reach. I cannot tell you in what direction it stretched even if you would care to know, for all the while that I was within Pellucidar I never discovered any but local methods of indicating direction⁠—there is no north, no south, no east, no west. <em>Up</em> is about the only direction which is well defined, and that, of course, is <em>down</em> to you of the outer crust. Since the sun neither rises nor sets there is no method of indicating direction beyond visible objects such as high mountains, forests, lakes, and seas.</p>
 			<p>The plain which lies beyond the white cliffs which flank the Darel Az upon the shore nearest the Mountains of the Clouds is about as near to any direction as any Pellucidarian can come. If you happen not to have heard of the Darel Az, or the white cliffs, or the Mountains of the Clouds you feel that there is something lacking, and long for the good old understandable northeast and southwest of the outer world.</p>

src/epub/text/chapter-2.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-2" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">II</h2>
-				<h3 epub:type="title">A Strange World</h3>
+				<p epub:type="title">A Strange World</p>
 			</hgroup>
 			<p>I was unconscious little more than an instant, for as I lunged forward from the crossbeam to which I had been clinging, and fell with a crash to the floor of the cabin, the shock brought me to myself.</p>
 			<p>My first concern was with Perry. I was horrified at the thought that upon the very threshold of salvation he might be dead. Tearing open his shirt I placed my ear to his breast. I could have cried with relief⁠—his heart was beating quite regularly.</p>

src/epub/text/chapter-3.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-3" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">III</h2>
-				<h3 epub:type="title">A Change of Masters</h3>
+				<p epub:type="title">A Change of Masters</p>
 			</hgroup>
 			<p>We must have traveled several miles through the dark and dismal wood when we came suddenly upon a dense village built high among the branches of the trees. As we approached it my escort broke into wild shouting which was immediately answered from within, and a moment later a swarm of creatures of the same strange race as those who had captured me poured out to meet us. Again I was the center of a wildly chattering horde. I was pulled this way and that. Pinched, pounded, and thumped until I was black and blue, yet I do not think that their treatment was dictated by either cruelty or malice⁠—I was a curiosity, a freak, a new plaything, and their childish minds required the added evidence of all their senses to back up the testimony of their eyes.</p>
 			<p>Presently they dragged me within the village, which consisted of several hundred rude shelters of boughs and leaves supported upon the branches of the trees.</p>

src/epub/text/chapter-4.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-4" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">IV</h2>
-				<h3 epub:type="title">Dian the Beautiful</h3>
+				<p epub:type="title">Dian the Beautiful</p>
 			</hgroup>
 			<p>When our guards aroused us from sleep we were much refreshed. They gave us food. Strips of dried meat it was, but it put new life and strength into us, so that now we too marched with high-held heads, and took noble strides. At least I did, for I was young and proud; but poor Perry hated walking. On earth I had often seen him call a cab to travel a square⁠—he was paying for it now, and his old legs wobbled so that I put my arm about him and half carried him through the balance of those frightful marches.</p>
 			<p>The country began to change at last, and we wound up out of the level plain through mighty mountains of virgin granite. The tropical verdure of the lowlands was replaced by hardier vegetation, but even here the effects of constant heat and light were apparent in the immensity of the trees and the profusion of foliage and blooms. Crystal streams roared through their rocky channels, fed by the perpetual snows which we could see far above us. Above the snowcapped heights hung masses of heavy clouds. It was these, Perry explained, which evidently served the double purpose of replenishing the melting snows and protecting them from the direct rays of the sun.</p>

src/epub/text/chapter-5.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-5" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">V</h2>
-				<h3 epub:type="title">Slaves</h3>
+				<p epub:type="title">Slaves</p>
 			</hgroup>
 			<p>As we descended the broad staircase which led to the main avenue of Phutra I caught my first sight of the dominant race of the inner world. Involuntarily I shrank back as one of the creatures approached to inspect us. A more hideous thing it would be impossible to imagine. The all-powerful Mahars of Pellucidar are great reptiles, some six or eight feet in length, with long narrow heads and great round eyes. Their beak-like mouths are lined with sharp, white fangs, and the backs of their huge, lizard bodies are serrated into bony ridges from their necks to the end of their long tails. Their feet are equipped with three webbed toes, while from the fore feet membranous wings, which are attached to their bodies just in front of the hind legs, protrude at an angle of 45 degrees toward the rear, ending in sharp points several feet above their bodies.</p>
 			<p>I glanced at Perry as the thing passed me to inspect him. The old man was gazing at the horrid creature with wide astonished eyes. When it passed on, he turned to me.</p>

src/epub/text/chapter-6.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-6" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">VI</h2>
-				<h3 epub:type="title">The Beginning of Horror</h3>
+				<p epub:type="title">The Beginning of Horror</p>
 			</hgroup>
 			<p>Within Pellucidar one time is as good as another. There were no nights to mask our attempted escape. All must be done in broad daylight⁠—all but the work I had to do in the apartment beneath the building. So we determined to put our plan to an immediate test lest the Mahars who made it possible should awake before I reached them; but we were doomed to disappointment, for no sooner had we reached the main floor of the building on our way to the pits beneath, than we encountered hurrying bands of slaves being hastened under strong Sagoth guard out of the edifice to the avenue beyond.</p>
 			<p>Other Sagoths were darting hither and thither in search of other slaves, and the moment that we appeared we were pounced upon and hustled into the line of marching humans.</p>

src/epub/text/chapter-7.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-7" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">VII</h2>
-				<h3 epub:type="title">Freedom</h3>
+				<p epub:type="title">Freedom</p>
 			</hgroup>
 			<p>Once out of the direct path of the animal, fear of it left me, but another emotion as quickly gripped me⁠—hope of escape that the demoralized condition of the guards made possible for the instant.</p>
 			<p>I thought of Perry, and but for the hope that I might better encompass his release if myself free I should have put the thought of freedom from me at once. As it was I hastened on toward the right searching for an exit toward which no Sagoths were fleeing, and at last I found it⁠—a low, narrow aperture leading into a dark corridor.</p>

src/epub/text/chapter-8.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-8" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">VIII</h2>
-				<h3 epub:type="title">The Mahar Temple</h3>
+				<p epub:type="title">The Mahar Temple</p>
 			</hgroup>
 			<p>The aborigine, apparently uninjured, climbed quickly into the skiff, and seizing the spear with me helped to hold off the infuriated creature. Blood from the wounded reptile was now crimsoning the waters about us and soon from the weakening struggles it became evident that I had inflicted a death wound upon it. Presently its efforts to reach us ceased entirely, and with a few convulsive movements it turned upon its back quite dead.</p>
 			<p>And then there came to me a sudden realization of the predicament in which I had placed myself. I was entirely within the power of the savage man whose skiff I had stolen. Still clinging to the spear I looked into his face to find him scrutinizing me intently, and there we stood for some several minutes, each clinging tenaciously to the weapon the while we gazed in stupid wonderment at each other.</p>

src/epub/text/chapter-9.xhtml

@@ -9,7 +9,7 @@
 		<section id="chapter-9" epub:type="chapter">
 			<hgroup>
 				<h2 epub:type="ordinal z3998:roman">IX</h2>
-				<h3 epub:type="title">The Face of Death</h3>
+				<p epub:type="title">The Face of Death</p>
 			</hgroup>
 			<p>I must have fallen asleep from exhaustion. When I awoke I was very hungry, and after busying myself searching for fruit for a while, I set off through the jungle to find the beach. I knew that the island was not so large but that I could easily find the sea if I did but move in a straight line, but there came the difficulty as there was no way in which I could direct my course and hold it, the sun, of course, being always directly above my head, and the trees so thickly set that I could see no distant object which might serve to guide me in a straight line.</p>
 			<p>As it was I must have walked for a great distance since I ate four times and slept twice before I reached the sea, but at last I did so, and my pleasure at the sight of it was greatly enhanced by the chance discovery of a hidden canoe among the bushes through which I had stumbled just prior to coming upon the beach.</p>