Someone from the child_lit listserv brought a site dedicated to Louis Slobodkin to my attention. (As well as to the attention of everyone else on the listserv.) Take a look at the books this guy illustrated. Though I can't remember reading any of these, I've certainly heard of some of them. Plus for readers of a certain age, the overall look of the books is very familiar. Very fifties and early sixties.
He was a Caldecott winner, by the way. For a James Thurber book, no less.
Be sure to scroll down to the Family Photos. Again, they are so...historic, so from their era.
A great site.