Born at Liverpool on April 7th, 1858, the son of William Collingwood, well known as a member of the Royal Society of Painters in Watercolours. Educated at Liverpool College, he matriculated at the University of London in the winter of 1875-6. He began to study for his profession in the School of Medicine, University College, Liverpool (then the Royal Infirmary School of Medicine), where he won the Junior and Senior Medals for Anatomy and Physiology. He entered University College, London, in 1877, and won the Silver Medal for Medicine, graduating as MB BS with 1st Class Honours, in 1882. At University College Hospital he filled the offices of House Surgeon, House Physician, and Obstetric Assistant, and was also Assistant to the Professor of Medicine, Senior Demonstrator of Anatomy, and Assistant Teacher of Practical Surgery at University College. Threatened with tuberculosis, he went out to Sydney in 1884, where he joined Dr Twynam in practice. His health greatly improved; he put on weight and finally weighed nearly 15 stone. His professional activity became prodigious. "Eight horses", says his biographer in the *British Medical Journal*, "hardly sufficed to enable him to get through his daily round of work." He took his meals hurriedly and irregularly; to use his own expression, he did not feed but 'stoked' - indeed, he worked his body as if it were an engine made of materials that would not wear out. In addition to one of the largest practices in Sydney, Collingwood was Hon Physician to the Prince Alfred Hospital, Visiting Medical Officer to the Infant Home, Ashfield, and Hon Surgeon to the Women and Children's Hospital, Petersham, Sydney (the suburb where he resided). He returned to England in the summer of 1898, apparently cured of his old trouble, but fell ill again and was for some time an inmate of the Sanatorium of Hohennef. His death occurred at Ringwood on September 23rd, 1899. Mrs. Collingwood and two children survived him.