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?t=t&id=433938 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 about 5 years ago. Unrectified.
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Layer List for Map 12924
Layer Title Year Number of Maps Percent Complete
?t=t&id=1030033 Parts
Last modified 10 days ago. Bibiliographic records: Digital Collections
646 maps 22%
(140 maps)
?t=t&id=1030033 United States (except New York)
Last modified about 8 hours ago. Bibiliographic records: Digital Collections
4886 maps 17%
(807 maps)
?t=t&id=1030033 Countries
Last modified about 8 hours ago. Bibiliographic records: Digital Collections
4927 maps 17%
(825 maps)
Displaying all 3 layers  per page.