Maps - Pennsylvania 1778 – Plan of General du Portail – Plan of the Position of Valley Forge after January 1778 Drafter/Publisher: Antoine Duportail Source(s): http://memory.loc.gov/ammem/gmdhtml/armhtml/armap.html 191} Related Posts 1777 – A Sketch of the Battle of Germantown March 31, 2014 177? – Survey of Region Embraced by Somerset, Bedford, and Fulton Counties March 31, 2014 1753 – A Map of Philadelphia and Parts Adjacent March 31, 2014