Biographical Account: Robert Kaye Greville was one of the most significant botanists of the 19th century.  He receieved his Doctorate from the University of Glasgow in 1824 and became a celebrated lecturer in the natural sciences.  He advised Margaret Gatty on microscopy techniques and the two exchanged specimens.  In addition to his knowledge of the natural world, Greville was a gifted artist.  He illustrated many of his own books, including Icones Filicum, which he wrote with William Jackson Hooker.