Original sentence: According to Donald Tuck, the author of an early SF encyclopaedia, the magazine kept a fairly high quality through Merwin's departure after a year, and through the subsequent brief period of caretaker editorship by Beatrice Jones.Dick, Ray Bradbury.Margulies took over the editor's post with the May 1954 issue.The quality of the fiction is thought by some commentators, such as Donald Tuck, to have generally fallen during his period at the helm, though this was not entirely his fault—there were a great many other magazines competing for stories by the top writers
Edited sentence: Dick, Ray Bradbury, and the magazine kept a fairly high quality through Merwin's departure after a year, and a brief period of caretaker editorship by Beatrice Jones.Margulies took over the editor's post with the May 1954 issue and maintained the standard of the fiction.The quality of the fiction generally fell during his period at the helm, though this was not entirely his fault—there were a great many other magazines competing for stories by the top writers