Atlas Comics
Shortly after this, publisher Martin Goodman's comics division had gone from being known as Timely Comics to Atlas Comics. There Tumlinson was the primary artist on Kid Colt, Outlaw from issues #14-24 (May 1951 - Jan. 1953) before turning over the reins, figuratively speaking, to the character's longtime signature artist, Jack Keller. Tumlinson had previously drawn an anthological Western story, "The Magic of Manitou", for Kid Colt, Outlaw #13 (March 1951). Later, Tumlinson drew Western stories for Atlas' Outlaw Fighters, Two-Gun Western and Wild Western.[4]
With the popularity of horror comics in the early to mid-1950s, Tumlinson produced a number of horror stories for Atlas titles including Astonishing, Journey into Mystery, Journey Into Unknown Worlds, Marvel Tales, Mystery Tales, Mystic, Strange Tales, and Uncanny Tales.[4] One story, "In the Dead of Night" by writer Hank Chapman and artist Tumlinson, appeared in issue #11 (Nov. 1951) of Suspense, an anthology based on the CBS radio program.[8]
His work in other genres spanned from stories in war comics, such as Battle, to the Biblical story "Cain and Abel" in Bible Tales for Young Folk #5 (March 1954). Tumlinson's last recorded comics credit is the four-page story "The Last Chance", in Marvel Tales #141 (Dec. 1955).[4]