John Stevens Henslow (1796–1861), professor of botany at Cambridge University and Anglican clergyman, is best remembered for his role as a mentor to Charles Darwin. First published in 1862, this biography by Henslow's colleague and brother-in-law, Leonard Jenyns, pays tribute to a man he describes as one of the most remarkable of his time. Through vivid accounts of times spent with Henslow both in the university and on travels around Britain, he paints a portrait of a modest and conscientious man, whose pursuits were intended solely for the benefit of others. Recounting Henslow's scientific work and religious endeavours, Jenyns also explores his pioneering contribution to botany and geology, his assistance to the farmers and the poor of his parish, and the role of his faith in his work. Compiled with help from Darwin and other colleagues, Jenyns' memoir provides a unique insight into an important figure in scientific history.