During that time, Murphy became a serious amateur artist. Amateur, in the sense that he made few finished paintings while not having to depend on making art to earn a living. Nevertheless, his carefully structured, hard-edge, modernist-inspired works were nearly all of very high quality for his genre.
The Wikipedia entry about the Murphys is here, and more can be found here.
Images of most of Murphy's paintings are below. Some are lost or destroyed, so only black-and-white photos of them remain. I consider "Boatdeck," "Razor," and "Watch" to be his best.