Page "Startling Stories" Paragraph 4

Merwin succeeded in making Startling popular and successful, and the bimonthly schedule was resumed in 1947.

At the start of 1952 Startling switched to a monthly schedule ; this was unusual in that Startling was notionally junior to Thrilling Wonder, its sister magazine, which remained bimonthly.

Merwin left shortly before this switch, in order to spend more time on his own writing.

He was replaced by Samuel Mines, who had worked with Standard's Western magazines, though he was a science fiction aficionado.