In 1840 Mr. Bowman, at the early age of twenty-four, was appointed Assistant-Surgeon to King’s College Hospital. His scientific writing became much in demand. He wrote on Surgery in the “Encyclopædia Metropolitana,” on Muscle, Motion, and Mucous Membrane in Todd’s “Cyclopædia of Anatomy and Physiology,” and took a large share with Dr. Todd in writing and illustrating the “Physiological Anatomy and Physiology of Man,” which was brought out in parts. The desire to render this book as far as possible accurate and original by repeating most of the observations of others and making new ones where necessary, led to successive delays in the appearance of the parts. Finally the closing part was written by Dr. Lionel Beale, and published in 1856. Having become a Fellow of the College of Surgeons in 1844, Mr. Bowman in 1846 joined the staff of the Royal London Ophthalmic Hospital, Moorfields, as assistant-surgeon, having already made extensive researches into the minute structure of all the organs of special sense. His advent to the Moorfields Hospital was marked by the delivery, in 1847, of a series of lectures on the “Parts Concerned in Operations on the Eye,” which were afterwards separately published. It was evident that ophthalmic surgery had gained a distinguished recruit. Mr. Bowman had, independently of Brücke, discovered the ciliary muscle, and his work brought forward numerous other facts of structure for the first time. His paper “On the Structure of the Vitreous Body,” contributed to the _Dublin Quarterly Journal of Medical Science_, also attracted good attention. His suggestions on operations for artificial pupil in the _Medical Times and Gazette_ also showed conspicuous capacity for ophthalmic surgery. Although much urged to devote himself exclusively to this branch of practice, Mr. Bowman preferred to continue in general surgical practice for many years, attaining the surgeoncy to King’s College Hospital in 1856, two years after he had reached the full surgeoncy at Moorfields. In 1848 he had been conjoined with Dr. Todd in the professorship of physiology and general and morbid anatomy in King’s College, retaining the professorship, after Dr. Todd’s retirement, in conjunction with Dr. Beale. But by 1855 Mr. Bowman found himself so fully occupied that he finally resigned the professorship. He held the surgeoncy to King’s College Hospital till 1862.