The Brooklyn-based artist presents video and artifacts from two of his most recent exploration performances: the find the source of Kingsbury Run, an ancient waterway long buried beneath the streets of Cleveland; and to reclaim Petty’s Island, a small strip of land in the Delaware river between Philadelphia and Camden, in the name of Ralston Laird, an Irish immigrant who lived there for 50 years as the head of a tiny farming community of recently arrived Americans.