J. S. HENSLOW was for many years Professor of Botany at Cambridge, but it is his life as Rector of Hitcham in Suffolk that finds special prominence in the interesting Memoir which formed the subject-matter of his son's lecture. The account given of his educational methods will be read with interest in these days when "Nature Study" has been sprung on the world as a new thing. JOHN LINDLEY was a man of the most amazing energy and his scientific output was prodigious. Though he attained high distinction in many fields of Botany, being an accomplished Systematist and Palaeobotanist, probably his greatest service was on the scientific side of Horticulture. Considering the scale of production, the work of Lindley maintains a remarkably high level. It is recorded of him that he never took a holiday till he reached the age of 52. His was the dominant personality in Botany of the early and mid-Victorian era. WILLIAM GRIFFITH had the energy and power of endurance of Lindley, under whose influence he came. Trained to the practice of medicine he took service under the East India Company where he was able to devote the priceless intervals between his official duties to botanical travel, collecting, and the morphological investigation of Indian plants. The results of his brief but remarkable career are embodied mainly in his voluminous illustrated notes which were published posthumously in 1852. The name of Griffith has been happily linked with that of Treub, his brilliant successor in our own times. ARTHUR HENFREY belonged to a very different type. Compelled by ill-health to the life of a recluse, his short life was mainly devoted to making known in England the great discoveries of the Hofmeisterian epoch. To Henfrey belongs the credit of being the first of our countrymen to recognise the full significance of the new morphology, the general recognition of which, however, he did not live to see. Henfrey was an extremely competent all-round Botanist whose single-minded devotion to his subject should not be allowed to fall into oblivion. WILLIAM HENRY HARVEY is a representative of a numerous class among the followers of Botany in this country. A man of great personal charm and high culture, he was attracted into the subject from the love of collecting. His special field was that of the Marine Algae, in which he stood unrivalled. Harvey was an exquisite delineator of the seaweeds of which he was so enthusiastic a student. The memoir, based on his journals and letters, which was published shortly after his death, is a book well worth reading for its intimate sketches of the naturalists of his day and the vivid notes on his extended travels in the colonies and elsewhere.