Watch Movies2Watch. Forgotten Founders: David Hempstead, Senior, is a short-form documentary that highlights the life of David Hempstead, Senior on the East End of Long Island, tracing him from slavery to freedom. Hempstead, Senior’s children were founding members of the Eastville community in Sag Harbor. It also documents the story and work of the Plain Sight Project, which works to uncover the legacies of enslaved, indentured, and free people of color on the East End of Long Island and beyond.