AC Comics editor Bill Black identified the art in in this strip as being by Will Eisner. Larry Antonette drew Yarko in 1941 according to the Who's Who. Writer/art credits revised from Bob Powell to ? by Craig Delich 2010-1-10 since the Who's Who does NOT list Powell with any credits for Yarko and Powell did NOT use the pen name of Anthony Brooks [according to the Who's Who], nor did Eisner use the pen name of Anthony Brooks.
Writer credit revised from Munson Paddock to ? by Craig Delich 2010-1-10. The Who's Who only lists Paddock as artist on this strip.