Kopp, J., & Rolph, D. N. (2016). 300-year-old letter tells of treasure buried beneath Society Hill: Pennsylvania treasure hunter claims to know its location, but a search is unlikely.

Kopp, John., and Daniel N. Rolph. 300-year-old Letter Tells of Treasure Buried Beneath Society Hill: Pennsylvania Treasure Hunter Claims to Know Its Location, but a Search Is Unlikely. 2016.

Kopp, John., and Daniel N. Rolph. 300-year-old Letter Tells of Treasure Buried Beneath Society Hill: Pennsylvania Treasure Hunter Claims to Know Its Location, but a Search Is Unlikely. 2016.