Alexander Lee "Skip" Spence (April 18, 1946 ? April 16, 1999) was a musician and singer-songwriter. He was born in Windsor, Ontario, Canada.Spence was a guitarist in an early line-up of Quicksilver Messenger Service before Marty Balin got him to be the drummer for Jefferson Airplane. After one album with Jefferson Airplane, their debut Jefferson Airplane Takes Off, he left to co-found Moby Grape, once again as a guitarist.Spence suffered from schizophrenia. During the 1968 recording of the group's second album, Wow, Spence allegedly attempted to break down a bandmate's hotel room door with a fire axe while on LSD, and was committed for six months to the criminal ward at New York's Bellevue Hospital. Upon his release, he recorded his only solo album, the now-classic psychedelic/folk album Oar (1969, Columbia Records). However, mental illness and alcoholism prevented him from sustaining a career in the music industry, and he lived much of his later life as a homeless person in Santa Cru
Source:
http://en.wikipedia.org/wiki/Skip Spence