Martin Van Horne (1944-1991) was active in the Richard Heakin Memorial Butterfly Brigade, a group of gay men and lesbians
organized to stop violent attacks against gay people in San Francisco. His papers document some of the activities of the Butterfly
Brigade, including their whistle campaign. The collection includes flyers, press releases, correspondence and the "Butterfly
Collection is open for research. Mailing lists and other records holding the names, addresses, and/or phone numbers of individuals
will be restricted for 20 years.