By Eugene
Pierre Jean Van der Ouderaa (Belgian, 1841-1915)
Philip Hermogenes Calderon (English, 1833 – 1898)
José Casado del Alisal (Spanish, 1832-1886)
Theodor Bohnenberger (German, 1868-1941)
Luc-Olivier Merson (French, 1846-1920)
Cesare Auguste Detti (Italian, 1847-1914)
Evariste-Vital Luminais (French, 1822-1896)