The Fernandina Beach Rotary Club heard from member Clyde Davis whose passion for local history recently led him on a trip to Washington D.C. Davis, on a tip from his son, Bud, a geophysicist, attended a General Service Administration auction to bid on a rare treasure from Nassau County's past -- three copper plates, weighing a total of 72 pounds. The plates were created at the completion of a survey of Amelia Island and eastern Nassau County by the Army Corps of Engineers in 1917 and were used to create lithograph stones for printing topographic maps. Davis said the plates are carved in amazing detail, showing houses, schools, swamps, rivers, the lighthouse and Ft. Clinch -- all as they appeared in the early 1900s. The copper plates are now on loan to the Amelia Island Museum of History in an exhibit created by Fernandina Beach High School students.