The Case Book Of Mr. Campion/ Margery Allingham/1947/an extremely scarce mystery

Offered for sale: Allingham, Margery, The Case Book Of Mr. Campion, with an Introduction by Ellery Queen, 1947 Mercury Book (No. 112) edition, New York: The American Mercury, Inc., Publishers, a Fair trade, softcover copy (see "Condition Description section for full details), this is an extremely scarce title by this very popular mystery aut