John Stevens Henslow is known for his formative influence on Charles Darwin, who described their meeting as the one circumstance "which influenced my career more than any other." A Professor of Botany at Cambridge University, Henslow was Darwin's teacher and eventual life-long friend, but what of the man himself? In this new biography, much previously unpublished material has been carefully gathered to produce a rounded picture of a remarkable academic and Victorian philanthropist. The time in 1829-31, when Darwin "walked with Henslow" in and around Cambridge, was followed directly by...