Molloy (aka Austin Ó Maolaoid, AóM) had a pretty prolific career, serving An Gúm (The Scheme), a government initiative in Ireland started in 1925 to publish books in Irish, as his main client for many years. All the images below pre-date 1925, but many of them could have been done in the last 40 years by someone like Russ Nicholson (specifically the boy fighting the hound, or the Grummsh-looking mother-effer below it).
I can't remember exactly how I stumbled across his work, but I do know it was during a recent "Archive.org expedition" (what I call those times I sit front of the TV with my feet up, my laptop in my lap, and I just keep poking around Archive.org until I find something relevant-but-previously-undiscovered-by-me).
SO DIG THIS STUFF!!!