Angus MacLise was a musician, poet, artist, and countercultural figure who was a mainstay of the downtown New York arts scene in the 1960s, which included Fluxus alongside other avant-garde communities and scenes. Hetty MacLise was an English-born artist, poet, and multi-instrumentalist likewise associated with various overlapping movements and milieus within the 1960s and 70s avant-garde. This collection contains papers, documents, publications, ephemera, sound and video recordings, photographs, and artwork primarily created by, given to, or related to Angus MacLise and Hetty MacLise.