In 1831, when the Apothecaries’ Society first required candidates for their diploma to attend lectures on Medical Jurisprudence, Mr. Taylor was appointed to lecture on the subject at Guy’s Hospital, a post which he continued to hold for forty-seven years. In the next year he succeeded Mr. Barry as co-lecturer on chemistry with Mr. Aikin, whose colleague he continued till 1851, after which he was sole lecturer on chemistry till 1870, when he resigned this lectureship. In these important functions Dr. Taylor acquitted himself admirably. He was exceedingly clear in his statements, exact and successful in his experiments, while yet very undemonstrative in manner. In 1832 the new lecturer commenced his long series of memoirs bearing on poisoning, by publishing an account of the Grotto del Cane, near Naples, with remarks on suffocation by carbonic acid. This appeared in the _London Medical and Physical Journal_. In subsequent years he contributed important papers to Guy’s Hospital Reports, on the action of water on lead, on poisoning by strychnia, on the tests for arsenic and antimony, &c., and was soon a recognised authority on medico-legal questions. He contributed to the _London Medical and Physical Journal_ valuable memoirs on poisoning, child-murder, &c. In 1836 he published the first volume of a work on medical jurisprudence which was not completed at that time. In 1842 he brought out his well-known “Manual of Medical Jurisprudence,” which reached its tenth large English edition in 1879, in the author’s lifetime, in addition to numerous American editions. The Swiney Prize of 100 guineas, together with a valuable silver vase for a work on Jurisprudence, were also awarded to him. In 1848, when he became a member of the College of Physicians, Dr. Taylor published a work on Poisons which was at once accepted as standard, and has gone through several editions. In 1865 his large work entitled “The Principles and Practice of Medical Jurisprudence” appeared, including much matter for which there was not space in his manuals. This work attained its third edition in 1883, having been edited by Dr. Thomas Stevenson, his distinguished successor at Guy’s Hospital. But this represents only a portion of the literary labours of Dr. Taylor. From 1844 to 1851 he was the editor of the _London Medical Gazette_, afterwards incorporated with the _Medical Times_. He largely co-operated in editing various editions of Pereira’s Materia Medica. He brought out in conjunction with Professor Brande a Manual of Chemistry in 1863, and in 1876 edited Dr. Neil Arnott’s celebrated work on Physics. He was elected in 1853 Fellow of the College of Physicians, having had previously conferred upon him the honorary M.D. of St. Andrews University. He was elected a Fellow of the Royal Society in 1845. He married in 1834 a Miss Cancellor.