Mary's Soulful Kittens, Naive Graphite/Charcoal Drawing, Framed as Found

However ever to resist this fluffy pair? Distinctly different faces on each, but each feeling like the very essence of kitten-hood. Signed at lower right but partially concealed by the frame-- Mary someone! Sold in the frame I found them in, where they've lived for quite a while; I might honor them with a larger and more distinctive frame, maybe stained black, but they're charmers in any context.

9" x 7" framed, under glass, as found. C. 1940s or so I would think, good condition.