In a letter dated December 6, 1857 and addressed to Sir William J. Hooker, Dr. Asa Gray wrote, “A noble fellow is Sullivant and deserves all you say of him and his works. The more you get to know him the better you will like him.” This story of the life and achievements of William Starling Sullivant reveals clearly and impressively the accuracy of Dr. Gray’s appraisal, for one could scarcely hope to encounter anywhere a more interesting or a more likeable personality.