Exceptionally large 6 7/8" x 3 5/16" Quartzite Adena Knife - Coleman farm, Preston Maryland.

Exceptionally large 6 7/8" x 3 5/16" Quartzite Adena Knife found at the Coleman farm Preston Maryland. This item was collected by old-time collector Gene Boardman between 1908-1938. From the collection of Walter Dudkewitz who bought the Boardman collection in 1970. .