Since that piece is at the Art Institute of Chicago, you might contact them
to send you stuff about it and the artist. All I know without further
research is that it was painted during WWII and that it is a picture of
opposites: a skeleton on one side with a blooming rose on the other; the
smoke of destruction on one side, a building being erected on the other.
The large slab in the middle upon which the rock sits MAY be an altar. It
is a picture of hope - laboring to rebuild civilization out of the ruins of
its own destruction. Since I'm not a source, you can't quote me, but that
info is based upon Art Institute materials.
Also, have you simply tried putting Peter Blume's name into your www search
Good luck! (I think your choice of pieces is terrific!)