One flat, angular fragment which appears layered and oily. One edge appears cut/sawed, while the opposite is rough and jagged. The object could possibly be vellum or turtle shell.
This excavation conducted in 1981 uncovered archaeological resources from the 17th to the 19th centuries.
The report is in 6 volumes. Please click the following to access each volume: The Archaeological Evaluation of the Seven Hanover Square Block, New York, ...