Born on December 8th, 1877, the only son of James Noon, of the Charterhouse. He entered Charterhouse School in 1891 and left in 1896, having in the meantime gained the junior and senior scholarships and an exhibition in science. He also shot in the school VIII for the Ashburton Shield in 1894-1896, the team being winners in 1895 and 1896. He had a brilliant career at Cambridge, where he obtained a first class in both parts of the Natural Science Tripos in 1898 and 1900 and a major scholarship for advanced physiology at Trinity College in 1899. He entered St Bartholomew's Hospital, winning the open scholarship in anatomy and physiology, and was House Surgeon and Ophthalmic House Surgeon. In September, 1905, he was nominated to a research scholarship at the serum department of the Lister Institute at Elstree when Professor G Dean was Director. Here he carried out an important research on the laws governing the neutralization of tetanus toxin by brain tissue. In 1906 he became the John Lucas Walker Student for Research in Pathology at Cambridge, and in 1909 he was Assistant in the Inoculation Department at St Mary's Hospital under Sir Almroth Wright. He had to relinquish laboratory work early in 1911 owing to failing health, and he died unmarried at his house, 30 Devonshire Place, London, on January 20th, 1913. Noon proved himself a most capable pathologist during the short span of life allotted to him. His work was almost wholly connected with immunity, and was of a general theoretical character opening up wide fields of inquiry rather than of a direct practical application. It dealt chiefly with the nature of the toxins and antitoxins of tetanus, the mechanism and localization of the production of antibodies, and, with a more practical outcome, active immunization against hay fever by the inoculation of extracts of pollen. Noon maintained his interest in rifle shooting to the end of his life. He was deeply but not ostentatiously religious, interested in all subjects, extraordinarily fertile both in new conceptions and in bold generalizations, but ready and ingenious in destructive criticism. All his colleagues were his friends. Publications:- Noon's scientific papers appeared in the *Jour of Pathos and Bacteriol*, in the *Jour of Hygiene*, and in the *Lancet*.