Tracing of a petroglyph of a rectangle with triangular markings on one side
Petroglyph tracings B: Enclosed designs #1. 6 negatives and 4 positives. Marion Robertson's Rock Drawings of the Micmac Indians interpret this petroglyph as "frames for stretching and decorating hides."
Reference: George Creed - Petroglyphs Nova Scotia Archives MG 15 Vol. 11 B1