Howard penciled and inked every cover and virtually every story, and occasionally scripted a tale. The three-issue reprint series Prof. Coffin #19-21 (Oct. 1985 - Feb. 1986) retains the "created by" credit.
The three-issue reprint series Prof. Coffin #19-21 (Oct. 1985 - Feb. 1986) is credited to Howard, who drew and inked all the covers and most of the stories, with occasional writing contributions.