Guaraldi died suddenly on February 6, 1976, at age 47 after suffering a massive heart attack. The evening before, he had dined at Mendelson's home and was reportedly not feeling well, complaining of indigestion-like chest discomfort. "He was about to do his first cruise. He'd be able to play "Peanuts" music on the ship, and he was excited about that. We talked about the cruise and the "Peanuts" shows, and I said that I didn't know what the next one would be yet, but that we wouldn't start until he got back. But he also said he wasn't feeling well, and had gone to see the doctor. The doctor thought Vince might have a diaphragmatic hernia, and that they might have to deal with it."