Bob Powell's Complete Cave Girl

Bob Powell was an artist who was mainly active during the Golden Age of American comics. He attended the Pratt Institute in New York City, and went to work for the Eisner-Iger studios in the late 1930s. He worked for many companies through the studios, like Fiction House, Fox, Harvey, Timely, and Quality.
His most famous during his Eisner-Iger years was Sheena, which he created for Fiction House's Jumbo Comics. Later on, Powell went to work in Will Eisner's personal studio, and co-plotted the first Blackhawk story, and co-created Spirit of 76 for Harvey's Pocket Comics. When the Spirit Sunday comic book section started in 1940, Powell took on the artwork of the Mr Mystic back-up feature, which was written by Eisner. After a while, Powell took on the writing as well, and he continued Mr. Mystic until he joined the Air Force in 1943.
After the war, Powell started working for himself, drawing for several publishers. He did work for numerous publishers including Marvel (Daredevil, Giant-Man, Hulk and Human Torch). Powell also did the pencil art for the famous bubble gum trading card series, Mars Attacks. In 1961 he became art director for Sick magazine, a position which he held until his death in 1967.