https://barebonesez.blogspot.com/2023/06/the-hitchcock-project-halsted-welles_0205933789.html
In which Jack notes the similarities between the two stories, that have been noted over the years from the even greater similarities of how both were adapted US tv anthology series, the Langelaan for Alfred Hitchcock Presents: and the Gilford, published under his "Douglas Farr" pseudonym in AHMM in 1960, for Night Gallery. Apparently, nothing was too explicit about which Gilford story was adapted by Serling for NG, but Peter Enfantino dug it out for him, and sent him to one of the Dell Books anthologies drawn from Alfred Hitchcock's Mystery Magazine, this one with the typically punning title Alfred Hitchcock's Down by the Old Bloodstream, first published by Dell in 1971 and repackaged in 1981 with the "'s" removed...where in the acknowledgements, Douglas Farr is cited as the author, a genuine Gilford pseudonym (perhaps employed because Gilford had more than one story in an AHMM issue), only someone at Dell (?) apparently decided that "Douglas Farr" was Really "John Farr" (or some arguable variation), an occasional pseudonym used by the writer Jack Webb (John Alfred Webb), and so tagged four Gilford/"D Farr" stories in "AH" anthologies from AHMM Dell published around the turn of the '70s as by Jack Webb...no doubt hoping casual browsers might confuse this "Webb" with either the writer Webb or the radio/television/film actor/writer/producer Jack, or John Randolph, Webb.
The FictionMags Index has cited the four I refer to thus:
I understand Gilford might've had other concerns as early as '69, so might've not been aware of this at all...but I sure would like to know, and have long liked to know, who was editing these AHMM-extract volumes for Dell (as opposed to pre-AHMM Dell "Hitchcock" anthologies ghost-edited by Don Ward, the Dell reprints of the Random House anthologies ghost-edited by Robert Arthur till his death, and then by Harold Q. Masur, the Davis Publications volumes mostly edited by AHMM editors, or the Random House handsomely illustrated YA anthologies edited once by Muriel Fuller, most of them by Robert Arthur, and two after Arthur's death by Henry Veit).
I suspect such an odd bit of shoddiness such as this probably points, at very least, away from the magazine staff.
TM