On this date -- February 20 -- in 2014, artist and Kerouac friend Robert LaVigne died. LaVigne (I've seen it with the V capitalized and not capitalized) was Guy Levesque in Jack Kerouac's Desolation Angels. That is it according to the Character Key to Kerouac's Duluoz Legend, yet Allen Ginsberg himself identifies LaVigne as Robert Browning in Big Sur (see Ginsberg link below). The Duluoz Key says Browning was William Morris. I asked Key curator Dave Moore about this discrepancy and will update this post with his response.
UPDATE: Dave Moore sent me the below scan from one of Kerouac's notebooks (titled "Duluoz Legend Personae Names"), where we can see in Jack's own handwriting that Robert Browning in Big Sur was William Morris, a painter friend of Philip Whalen. And so, we will defer to Jack and assume that Alan was wrong.
In a 1955 letter to Allen Ginsberg, Kerouac refers to Lavigne as a "canuck painter." There are no letters to or from LaVigne included in either of Ann Charters' compilations. Ginsberg referred to LaVigne as a "Painter friend of Poets." Natalie Jackson, who we remembered here, was a model of LaVigne's. A well-known story about LaVigne is that it was his portrait of Peter Orlovsky -- his model and lover -- that caused Allen Ginsberg to request an introduction to Orlovsky, beginning a life-long relationship between the two.
LaVigne has papers archived at Columbia University. See http://www.columbia.edu/cu/lweb/archival/collections/ldpd_4079553/ (this resource includes a concise biographical sketch).
LaVigne's drawing of Jack adorns the cover of one version of The Scripture of the Golden Eternity (see below).
RIP, Mr. LaVigne.