In 1969, following a number of stresses and pressures, William Patterson's contract to write Jeff Hawke came to an end. He was not in good mental health and remained in London, separated from his family who stayed in Perth. Willie Patterson's physical health also was affected and he died in 1986, aged only 57 years old. He was laid to rest in Kensal Green cemetery, attended by his daughters Chrys Muirhead and Frances Patterson, and Sydney Jordan. The 1986 Titan Books republication of Jeff Hawke, Book Two, contains a testimonial to the life of Willie Patterson, by Sydney Jordan.