That's Joyce on the left and the Baileys on the right. I haven't been able to uncover anything about The Baileys. The copyright page was missing from the well-used coloring book. But Joyce seemed to be somewhat influenced by their style, or at least by their era's style. It's fun to look at the similarities.
I ripped off the coloring book cover for our poster below. My apologies to the Baileys, whoever they were.