Justice League of America Vol 1 193

The Monster's presence in this issue's 2nd story is due to an act of time-travel on the part of Per Degaton. At this point in time, Jason Rogers is still a feeble-bodied industrialist, and will not embark on his criminal career until 1944.^[1]
Professor Zodiak's presence in this issue's 2nd story is due to an act of time-travel on the part of Per Degaton. At this point in time, Zobar Zodiak is still a master of chemistry and mechanics, and a dabbler in the occult sciences, and will not embark on his criminal career until 1948.^[2]
Sky Pirate's presence in this issue's 2nd story is due to an act of time-travel on the part of Per Degaton. At this point in time, Sky Pirate's criminal career had seemingly not yet begun.^[3]
Solomon Grundy's presence in this issue's 2nd story is due to an act of time-travel on the part of Per Degaton. At this point in time, Grundy was still lying inert at the bottom of Slaughter Swamp and will not make his debut until 1944.^[4]
Wotan's presence in this issue's 2nd story is due to an act of time-travel on the part of Per Degaton. Wotan's actual whereabouts at this point in time are unclear. It is known that he had been been, earlier in the same year, seemingly killed in his second confrontation with Doctor Fate.

Presence of Kryptonite in this issue's 2nd story is due to an act of time-travel on the part of Per Degaton. At this point in time, kryptonite was still not discovered and will not make his debut until 1949.^[5]
The secret identities of Wes Dodds and Ted Knight are known to each other and to Johnny Thunder.

Trivia

Sandman mentions a Czech writer's term "robot" when fighting the Sky Pirate's mechanical men. The writer in question is Karel Čapek, who coined the term in his 1920 play R.U.R.