LEYS Henry - Edouard FÉTIS ( author ) : - Notice ( biographique) sur Jean Auguste Henri Leys (1815-1869), membre de l'Académie Royale de Belgique.

0. Bruxelles, Académie Royale, 1872, in-8°, Annuaire 1872, 38e année, sewn, original green stiff wrapper. (uncut, unopened copy). Article of ca. 35 pp published in the Academy's yearbook, with an engraved portrait. Here the complete yearbook is on offer. (With also an article on the English astronomer John Herschel by Quetelet). .