NOAA 596-00-1861 detail. This Petersburg map is an inset on a larger page that also shows a rough survey of the Namozine River and vicinity, titled "Map Showing Several Counties in Virginia." This map appears to be another copy of the "Kelly Map, 1854" copied below.
NARA G 164 Flat. This is a photographic copy (1864) from the files of the Engineer Department of a map drawn by James Kelly and published by J. D. Scott in 1854.