I heard this on the news this morning but do not have a link. He was suffering from mouth cancer. I was 5 years old when OLIVER! came out in 1968 and I can remember going to the theater and then playing the record over and over and over again throughout my childhood. It is one of my favorite musicals. I think Jack had a troubled life, but he was perfect as the Artful Dodger who matched wits with the conniving Fagan. I can also remember Saturday mornings watching him on "H.R. Pufnstuf". I loved that Witchiepoo!! RIP Jack. You were too young to leave us. P.S. I was shocked to learn that there were only 17 episodes of PufnStuf made. Somehow they managed to entertain me year after year through my elementary school days.