[1] In 1889 he continued his studies in Berlin under Wilhelm Krause; cellular pathologist Rudolf Virchow; and pioneering microbiologist and founder of modern bacteriology, Robert Koch, who received a Nobel Prize in 1905 for his groundbreaking research on tuberculosis.

[1] Returning from Berlin in 1890 he served as Obstetric Resident at St Bartholomew's Hospital[1] While holding this position he was appointed by the Royal College of Surgeons, Royal College of Physicians, and the Executive Committee of the National Leprosy Fund as one of the Special Commissioners to investigate the prevalence and treatment of leprosy in India.

[1] In 1894 he suffered from a severe attack of typhoid fever, but in spite of this won the prestigious Royal College of Surgeons' Jacksonian Prize in 1895 for his essay The Aetiology of Tetanus and the Value of the Serum Treatment.

[1] In 1896 he acted as Deputy to Professor Charles Roy, who had been appointed to the new Chair in Pathology at Cambridge[4] but was unable to take up the post due to ill-health.

[1] During the autumn of 1898 the report of his research on the tsetse fly, conducted by him in conjunction with Herbert Durham and Walter Blandford Archived 2 April 2015 at the Wayback Machine, was published.

[2] A sum of money was collected after his death to establish The Kanthack Memorial Library in the Pathological Institute of St Bartholomew's Hospital.