My other customer was examining a buckram-bound quarto volume by Matthew Gilligan, S. J. The Catogrammatic vs. the Syncogrammatic, it was called, or was it the other way around? I’d had the book ever since old Mr. Litzauer sold me the store, and if I’d never dusted the shelves it would never have been picked up at all. If this chap was going to steal something, I thought, let him hook that one.

But he returned Father Gilligan to his shelf even as Mary Carolyn Davies went out the door with my demure little poetry lover. I watched her until she crossed my threshold-she was wearing a suit and matching beret in plum or cranberry or whatever they’re calling it this year, and it was a good color for her-and then I watched him as he approached my counter and rested one hand on it.

His expression, insofar as the beard showed it, was guarded. He asked me if I bought books, and his voice sounded rusty, as if he didn’t get too many chances to use it.

I allowed that I did, if they were books I thought I could sell. He propped his attaché case on the counter, worked its clasps, and opened it to reveal a single large volume, which he took up and presented to me. Lepidopterae was its title, François Duchardin was its author, and Old World butterflies and moths were its subject matter, discussed exhaustively (I can only presume) in its French text and illustrated spectacularly upon its color plates.

“The frontispiece is missing,” he told me, as I paged through the book. “The other fifty-three plates are intact.”

I nodded, my eyes on a page of swallowtail butterflies. When I was a boy I used to pursue such creatures with a homemade net, killing them in a mason jar, then spreading their wings and pinning them in cigar boxes. I must have had a reason for such curious behavior, but I can’t begin to imagine what it might have been.