In 1963, when Beaumont was 34 and overwhelmed by numerous writing commitments, he began to suffer the effects of "a mysterious brain disease" which seemed to age him rapidly. His ability to speak, concentrate, and remember became erratic. While some people attributed all of this to Beaumont's heavy drinking, his friend and colleague John Tomerlin disagreed: "I was working closely with Chuck at the time, and we were good enough friends for me to know that alcohol by itself could not possibly account for the odd mental state that he was in."