Ex. A. Lincoln Sherk, MD collected 10/17/1915
Location: Hellertown Cave, Pennsylvania
A. Lincoln Sherk MD collected 12/5/1931
""Stuart F. Wise""
Stuart F. Wise
Location: Grace Mine, Pennsylvania
Location: Eldredge and Steward's Quarry, Pennsylvania
Location: Wheatly Mines, Pennsylvania
A specimen for the Pennsylvania collector. It is is very good shape with peripheral damage. It is from an old...