Born at Bristol, where his father was a prominent merchant. After school at Totteridge under C T Thorowgood, he was apprenticed to J G Lansdown, Surgeon to the Bristol General Infirmary. Subsequently he studied at Guy's Hospital, also at University College Hospital, at Edinburgh under Syme, and in Paris especially under Ricord. He was appointed Demonstrator of Anatomy at Guy's Hospital, in which post he proved an enthusiastic and successful teacher. Through the Crimean War he served as Assistant Surgeon at the Renkioi Hospital, and at the front. In 1860 he was elected Assistant Surgeon, and in 1869 Surgeon, to the London Hospital; he practised at 16 Queen Anne Street, Cavendish Square. Maunder distinguished himself as an operator, in particular over the ligature of arteries and herniotomy, once having had four operations for strangulated hernia within thirty hours. "Enthusiasm produced by it was followed next morning by a severe attack of jaundice." His name became associated with excision of the elbow, the use of the chisel in osteotomy, and his translation of Ricord's lectures. Courteous in manner, of military bearing, he spoke and lectured well on clinical and operative surgery, and at the London Hospital was Surgeon to the Special Ward for Ovariotomy. Unfortunately, about a year before his death occurred the failure of the West of England and South Wales Bank, in which the professional classes of the West of England had been led to invest. Maunder had inherited from his father shares upon which there was a considerable liability. He became irritable and prostrated. Under the advice of his friends, Sir William Gull and Richard Davy, Surgeon to the Westminster Hospital, he obtained three months' leave of absence and left London. But on July 4th, 1879, he fell out of an upper window and was killed. He was buried in Hillingdon Cemetery. He married in October, 1859, Miss Catherine Beaumont, the daughter of a Birmingham banker, and had by this marriage two daughters and a son - a lawyer, who died in 1910. His bibliography is extensive and is included in the *List of Books by Guy's Men, then in the Wills Library*, Guy's Hospital, 1913, by William Wale, and is also in the Library of the Royal College of Surgeons.