According to John Schoenherr’s work log, job #226 came along on February 7, 1962: it was from Dell, a cover for “Tales From A Tomb” [sic] and he was paid $200 for it on April 17.
But did this particular project wind up as the cover for “Tales From The Tomb” issued in October 1962 by Dell Comics? I think so.
The painting, however, has been attributed (here and here and here) to the master comic book artist L. B. Cole, who was an editor and art director at Dell at this time. I haven’t yet learned if the various attributors have any hard evidence that Cole actually painted this - and I readily admit that I’m not too familiar with Cole’s work. Even so, this painting is very different from Cole’s wild, bright, and wonderful work that can be seen here and here and here, for example.
The cover does, however, have many similarities with Schoenherr’s illustrations from the early 1960s: particularly in the handling of the sky, trees, branches, grass, and headstones (and it almost looks like the stone on the left is engraved with his initials, J.C.S.). It’s also worth comparing this cover with that for the Dell comic book “Space Man” which I discussed here and which would have been painted at the same time. So unless I find evidence to the contrary - and with all due respect to L. B. Cole and his many fans - I’ll go ahead and claim that this one really is another “long lost” illustration by John Schoenherr.