Davis' best know pulp detective, Max Latin, appeared in Dime Detective and has been collected by Altus Press, HERE. And Black Dog Books offers Dead Man's Brand, a collection of eight Norbert Davis westerns, HERE.
But Davis wrote a lot more than that. From Detective Fiction Weekly, I have two adventures of Simeon Saxon, an ex-con (innocent, of course) who now tries to help other folks walk the straight and narrow as a "public relations counsel." This tale is from January 18, 1936. The other story (coming soon), is "Diamond Slippers," from March 14 of that year.
I posted one of Davis' westerns, "Their Guardian from Hell," HERE.