None but a mule, by Barbara Woollcott.

This the memoir of growing up in a eccentric Baltimore family of 4 girls and their parents. The paterfamilias is the brother of Algonquin wit Alexander Woollcott, who appears in the book occasionally. Also having a cameo is HL Mencken, a personal friend of the family. I stumbled upon this book by complete accident and was charmed. In doing a little research on the author and her sisters lives after the book it is clear that they all remained real characters.