A Land office map from the early 1900s, after the demise of Washington. It would have been located somewhere between Grulli's House and Morgan's house.
An excerpt from Holts 1876 map of California and Nevada
Excerpt from an 1879 State of Nevada map. This map shows the wrong location for Cory's peak
Post office application
A map from the post office application. This gives the wrong Township and Range, however.
Illustration of the Washington Mining District
1919 State of Nevada Road map showing Washington long after it had vanished.
About as close as I could get to the one remaining building.