 The psychedelic posters Mouse and Kelley produced were heavily influenced by Art Nouveau graphics, particularly the works of Alphonse Mucha and Edmund Joseph Sullivan.Material associated with psychedelics, such as Zig-Zag rolling papers, were also referenced.Producing posters advertising for such musical groups as Big Brother and the Holding Company, Quicksilver Messenger Service, and Grateful Dead led to meeting the musicians and making contacts that were later to prove fruitful.