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@@ -188,14 +188,34 @@
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     end
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     def to_s(options = {})
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-      if options[:orientation] == :vertical
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+      rv = if options[:orientation] == :vertical
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         plot_vertically options
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       else
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         plot_horizontally options
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       end
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+      options[:box] ? box(rv, options) : rv
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     end
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     private
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+
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+    # Put a box around a histogram plot
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+    def box(rv, options = {})
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+      lines = rv.split("\n")
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+      hspace = ' ' * options.fetch(:hspace, 2)
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+      w = if options[:orientation] == :vertical
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+        ((@counts.size * (hspace.size + 1)) - hspace.size)
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+      else
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+        raise "Boxes currently aren't supported for horizontal graphs"
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+        [options.fetch(:max_width, @counts.size), @counts.size].min
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+      end
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+      h = lines.size
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+      tb = [0x2500].pack("U") * w
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+      rv = [ [0x256d].pack("U") + tb + [0x256e].pack("U") ]
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+      e = [0x2502].pack("U")
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+      rv += lines.map{|l| e + l + e}
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+      rv << [0x2570].pack("U") + tb + [0x256f].pack("U")
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+      rv.join("\n")
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+    end
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     def plot_vertically(options = {})
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       char = options.fetch(:char, '*')