What is James Hallen?

Colonel James Herbert Brockencote Hallen or J.H.B. Hallen CIE FRCSE FRCVS was a British veterinarian who served as Principal of the Dick's Veterinary School in Edinburgh from for the academic year 1866/67 and later worked in British India. His is best remembered for his role as General Superintendent of Horse Breeding in India and Chief Veterinary Officer to India, for his work on the Indian cattle plagues and for writing manuals on the treatment of horses and livestock, some of which were translated into Hindi and Urdu languages.