<page_title> List of Pennsylvania state historical markers in Washington County </page_title> <section_title> Historical markers </section_title> <table> <cell> William Holmes McGuffey </cell> <cell> April 23, 1998 <col_header> Date dedicated </col_header> </cell> <cell> National Road (US 40) at McGuffey High School/Middle School, just west of PA 221, east of Claysville 40°08′23″N 80°21′36″W / 40.139733°N 80.360133°W <col_header> Location </col_header> </cell> </table>
In 1998, the William Holmes McGuffey is a Pennsylvania historical marker at McGuffey High School/Middle School.