
Next, the Quentin Miller "when psychology fails" cartoon had been posted here once before - by you - and by a complete and total coincidence it is also today's entry in The Humorama Series (I chose it several weeks ago because I plan the updates several weeks ahead).

Finally, the Harry Jones cartoon is one I can't believe you managed to pick up in the past - I only found it myself a few weeks ago in an obscure magazine not at all known for spanking cartoons. I won't give the publication details here because there's time enough for that next year when I present it (it's not Humorama), but I think it's very clear that Harry Jones was not a spanker, as you surmised. He's also not a particularly gifted cartoonist, I'm afraid, and in fact made the "wrong hand mistake" because he swiped the secretary's figure as well as the idea of a secretary spanking from Bill Wenzel, probably after already drawing the spanker using his right hand! Bad way to plan your composition.
It was in fact swiped from Wenzel's first secretary spanking (and Humorama's first OTK spanking cartoon, although I have called it Secretary Spanking #26 in the Humor Gallery). You can see this for yourself very plainly:

Actually, Dan, this cartoon was in your personal collection at one time and maybe still is, although you never posted it here, which is yet another crazy coincidence. It first appeared in July 1955, while Jones' copy showed up 6 months later in January 1956.