The scientific career and parochial life of the late Rev. Prof. J. S. Henslow, are described by my late uncle, the Rev. Leonard Jenyns, in his _Memoir_[96]. I propose adding and illustrating some of his more personal traits, habits and pursuits as a scientific man, and to deal especially with his educational methods. His studies in science were by no means confined to one branch, thus Geology was first ardently pursued in conjunction with Sedgwick. It was in a tour together in the Isle of Wight in 1819, that they proposed establishing a "Corresponding Society, for the purpose of introducing subjects of natural history to the Cambridge students." The outcome of this idea, which was subsequently abandoned, was the "Cambridge Philosophical Society," of which "Henslow, B.A. was elected secretary in 1821[97]." Conchology and Entomology claimed his attention; one of his first discoveries was the rare insect _Macroplea equiseti_, his identical "find" being figured in Curtis' _British Entomology_, while he found the bivalve _Cyclas Henslowiana_, so named by Dr Leach, at Baitsbite on the Cam. His first and best collection of insects was presented to the Cambridge Philosophical Society. Other discoveries were made in after years, and are referred to by Jenyns. On the death of Dr E. D. Clarke, he offered himself for the Professorship of Mineralogy. Chemistry, as well as the study of Minerals, now occupied his attention. He was only 26 years of age, and still B.A., when elected to that chair. At the age of 27 he published his _Syllabus of Mineralogy_ in 1823, "A useful manual of reference to all persons studying Mineralogy, independently of the immediate circumstances which led to its publication[98]."