Peter Force’s catalog of manuscript maps. Alternate title from Philip Lee Phillips’ A list of maps of America, p. 699: Map showing the march of the British upon Philadelphia. Manuscript, pen-and-ink and watercolor. Has watermark. Relief shown by hachures.
https://lccn.loc.gov/gm71000921 [Operations of the British army, from the 25th August to 26th Sept. 1777] 1777? Scale ca. 1:100,000. col. map on sheet 53 x 45 cm. G3791.S3 1777 .O6