Cover art credits from Archives reprint.
Similar art to the Riss-credited pencil work on Manhunter stories in Police Comics (Quality, 1941 series) #37-#59.
Bob Hughes agrees on Riss pencils.
This is similar art to the many Manhunter stories in Police Comics (Quality, 1941 series) credited to Riss on pencils.
Art looks like the work in the signed Tumey story in #66.
Art identical to Zolnerowich's credited Swing Sisson stories in Feature Comics (Quality, 1939 series) #111 and #119.