Yankee Longago was a boy who could travel through time, whose adventures ran in BOY COMICS from #3 to #28. This particular story is from issue #5. Artist Dick Briefer found greater success at drawing another character, Frankenstien, whose comic book adventures ran for years in PRIZE COMICS and FRANKENSTIEN.
Reblogged from http://pappysgoldenage.blogspot.com/
The story ends with Cleopatra becoming a "sweater girl", something that was already in vogue in 1940, although Gary Grossman would have us believe otherwise.