Edgar Rice Burroughs didn’t write Northerns (but he did pen a few Westerns). The closest he came to it was setting the beginning of “The Resurrection of Jimber-Jaw” in Alaska. The plot has two scientists going to Russia because of difficulties with the US. (One had his new aeroplane design rejected by the U. S. military and the other, a researcher, has run amok of the S. P. C. A. for freezing and unfreezing animals.) They land in the Arctic and find a partially thawed caveman who they name Jimber-Jaw after a grizzly bear. Conveniently, one of them is a specialist in unthawing living things. The rest of the plot will be familiar to anyone who has seen Encino Man (1992). Boy meets girl (who reminds him of his prehistoric girlfriend). Boy loses girl. Boy does not get girl back. Jimber-Jaw ends up in a freezer trying to get back to his prehistoric world.
Burroughs wrote the five thousand word story in three days (March 22-25, 1936). It appeared in Argosy for $250. Argosy was feeling the pinch in the exploding Pulp market. The days of big paychecks were over for all their authors, including the Man Who Created Tarzan. The author and editor quibbled a little over title changes but over-all an easy sale. The book would remain uncollected until Tales of Three Planets (1964).