Unusual lot of three LSs in French signed by three successive kings of Prussia, each one page, ranging in size from 7 x 9 to 8.75 x 10, dated from 1788 to 1841. Signers are: Frederick William II ("Frd. Guillame," May 28, 1788), Frederick William III ("Frederic Guillame," April 23, 1801), and Frederick William IV ("Frederic Guillame," August 11, 1841). In overall very good to fine condition, with light scattered soiling and a few small edge tears. Accompanied by the original mailing envelope for the Frederick William II letter.