signed and captioned by artist, across bottom in black ink: Gregory Corso on Boulevard Pasteur Tanger 1961. Psylocybin Days. Arab & French Posters. Allen Ginsberg; on verso, by unknown hand, upper left in graphite [vertical]: T40; center right: 38; bottom left in graphite circled: 112; bottom center: GD-AG-388; bottom right: #511909 / [strikethrough] BK5 #36 / 1961 / GDC-682 35 WP
Allen Ginsberg Estate; Gary and Ellen Davis, Greenwich, CT; gift to NGA, 2011.