 The bum seated near Walter Huston in the first scene in the Oso  Negro flophouse is Jack Holt (I) (qv), father of  Tim Holt (I) (qv). (Holt is not the man who speaks to Bogart and  Tim Holt in the saloon, as stated by Eric Lax in his DVD commentary.  That actor is Pat Flaherty (qv).)