Rat Catching - Smith (Robert) The Universal Dictionary for Taking Alive and Destroying Rats, and all other kinds of Four-Footed and Winged Vermin,
First edition, 6 engraved plates,
B-A note: I selected this book, not just because of the novelty of a Dictonary of Catching Rats, but because the auction it was listed in had 14 auction lots totalling no less than 25 rat- and other vermin-catching books ranging in publication date from 1668 to 2001. It seemed an odd thing to collect. But I suppose there are many strange collections in the world.
Edit: Make that an ironic 15. While not actually about rat-catching, this was listed in the same auction. Hee.