I once knew a Bob Martin, later known (after service in Viet Nam) as Marty Martin. He was from Fresno, California, where he was one-third of our trio back in the early 1960's. Could this be the same person? We have not been able to locate him in years. He was a talented young guy then and was writing songs. I'm told he had a rough patch later on, but no details. He played upright bass with us but later played guitar as a single act. If this rings a bell, come on board.