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Map showing a portion of the boundaries of Maryland, Pennsylvania, & Delaware : as surveyed in 1849 & '50, under the direction of Lieutenant Colonel J.D. Graham, U.S. Topl. Engineers, at the request of H.G.S. Key, Joshua P. Eyre, & Geo. Read
from Parts (In 3 layers) Depicts: 1850 Last modified almost 6 years ago. Unrectified. |
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Layer | Title | Year | Number of Maps | Percent Complete |
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Parts
Last modified 3 months ago. Bibiliographic records: Digital Collections |
648 maps |
24% (153 maps) |
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United States (except New York)
Last modified about 1 month ago. Bibiliographic records: Digital Collections |
4888 maps |
19% (934 maps) |
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Countries
Last modified about 1 month ago. Bibiliographic records: Digital Collections |
4929 maps |
19% (953 maps) |