Originally Posted by GA Russell
It wasn't clear to me on whose behalf Cairo was working when he first hired Spade. Gutman? Hammett never made clear that Gutman and Cairo had a relationship prior to that date. Cairo's relationship was with Brigid in Constantinople, and Brigid was working for Gutman at that time, but the actual link (such as a meeting) between Cairo and Gutman at that point was never established, I don't believe.
Speaking of Cairo, it's not clear to me how he came to think that Spade had the Falcon to begin with. I don't recall any reason to think that Brigid told Gutman and Cairo that she had retained Spade & Archer. Are we to believe that Gutman and Wilmer arrived in San Francisco before Brigid and Thursby, and tailed them from the time they got off the boat? How else would Wilmer have known where to find Thursby to shoot him?