from Blackhawk (Quality Comics, 1944 series) #38 (March 1951) [with alterations, see notes]Blackhawk is i.d.'d as an American, Hendrickson as a German.
from Blackhawk (Quality Comics, 1944 series) #39 (April 1951) [with alterations, see notes]When reprinted in #71 the last page is removed and the last panel of page 4 is re-lettered. Original dialogue "He sure moves fast for an old geezer! Wait a minute! He's no old geezer! His beard's coming off! Maybe he's a spy or something! I'm going after him!" New dialogue "Hey, Mister!" and the policeman thinks "All right, fella, if you don't want to pick up your change it's hour business" and Chop Chop thinking "Me never take another picture!". Last page of the original story has Chop Chop being taken in by the police and recognized as a member of the Blackhawks.
from Modern Comics (Quality Comics, 1945 series) #101 (September 1950)Mordred was last seen in issue #42.