Progress of the army from their landing till taking possession of Philadelphia, 1777. Source: Library of Congress, http://www.loc.gov/item/gm71000678/#about-this-itemGerman map showing the invasion of the upper Delmarva Peninsula., 1777. Source: Norman B. Leventhal Map Center at Boston Public Library. Link: http://maps.bpl.org/id/11091
The Library of Congress, the Boston Public Library, and other virtual repositories have a series of detailed maps showing British operations on the upper Delmarva Peninsula, during the summer of 1777. Several of these detailed products show the camps, movement, and engagements, as well as the general topographic nature of the region at that point. Here are some samples. You may want to check these out if this subject is of interest to you. It is fascinating to be able to examine the details of the movements and the area, from multiple sources.
The campaign of 1777, Published London, C 1780., Source: Library of Congress. http://www.loc.gov/item/gm71000989/
This map from the Library of Congress show operations of the british army from the 25th of August to the 26th of Sept, 1777. Source Library of Congress. http://www.loc.gov/item/gm71000921/
