It turns out that Elizabeth wasn't particularly famous (or at least by Wikipedia standards) but it's well known that Margaret had connections with just about anybody who might merit a page, and it was on her Wikipedia entry that I learned that her other surviving sister, Priscilla, was married to Leo Rosten. Perhaps the most interesting "I didn't know that" of all this, however, wasn't part of the Mead family connections, but one to my own. It turns out that William Steig's father was a paintner.