As I recall, Jimmy Olsen temporarily subbed for David during the battle with Goliath in one of the issues of his title. True to form, at first Goliath pretended to be an ally of David's, giving Jimmy a whistle that he could use to call Goliath: a sort of bronze age signal watch. Of course, this was all revealed to be a trick by the Biblical Behemoth, who planned to wring Jimmy's neck thinking he was David when he could get the opportunity.
Wonder what the Atom made of that Krypto incident, given *he* was there at the time as well (via the Time Pool, in an early 70's story I have a reprint of)... ;-)
Ah, you mean "Suddenly, the Witness Vanished!" which was by none other than Elliot S! Maggin himself? The idea of that story is that of a man who goes to the future to steal records - but he finds himself in the obituaries, and discovers he will die in the Great Chicago Fire, and when the Atom tries to get him to come to the present to save his life, he accidentally knocks over Mrs. O'Leary's cow.
It doesn't surprise me there are multiple explanations for the Great Chicago Fire. Aren't there like six or seven different versions of Atlantis in DC
alone?
And I wonder how many explanations there are for how the dinosaurs died, or who REALLY built stonehenge.