Though a relatively minor figure in Doctor Who comics, he was one of the most important pre-digital colourists and inkers in the American comic book industry. His work stretches back almost to the very dawn of the super-hero comic book. He is known to have inked, for instance, at least as far back as Batman #2. His cover to The Incredible Hulk #1 and The Avengers #4 remain amongst the most-often reprinted examples of his colouring abilities.
He was also a penciller of some repute, having handled important assignments, like the story "How Clark Kent Met Lois Lane", a very much pre-Smallville account of the first encounter between Lois Lane and a young Clark Kent.
By the time he worked on Doctor Who (1984), he was nearing the end of a career that had fundamentally shaped not only the Golden Age DC universe, but the Silver Age Marvel one.