PGRule6/RobertMyronCoatesNotes
I came across this writer browsing Clute's Illustrated SF Encyclopedia.
11800 search on Coates and titles didn't find the Eater of Darkness novel - there are a bunch of stories in the New Yorker, Harper's, Redbook etc., that could be in some of the story collections, not knowing the contents I can't say.
Eater of Darkness I did not find. More searching to be done on the others.
Coates, Robert Myron (USA) Novels The Eater of Darkness (1929) abebooks suggests this was reprinted in 1959 http://dogbert.abebooks.com/servlet/SearchResults?sts=t&y=16&kn=coates+eater+darkness&x=33
The Farther Shore (1955)
The Night Before Dying (1955)
More info here says lots of his magazine stories included in some of these collections :- http://www.ru.nl/aspx/get.aspx?xdl=/views/run/xdl/page&SitIdt=6&VarIdt=11&ItmIdt=9510
Collections The Hour After Westerly: And Other Stories
Anthologies containing stories by Robert M Coates Timeless Stories for Today and Tomorrow (1952) Circus of Dr. Lao and Other Improbable Stories (1956)
http://www.fantasticfiction.co.uk/c/robert-m-coates/ http://www.sfsite.com/fsf/bibliography/fsfstorieswhen195001.htm
-- Main.RichardScott - 21 May 2006