Portrait of Sir Henry Dale, with Members of the Staff, Wellcome Physiological Research Laboratories. Front Row (Left to Right): G. H. J. Macallister, G. Barger, Henry Dale, R. A. O 'Brien, H. J. Sudmerson. Back Row: G. S. Walpole, A. T. Glenny, J. H. Burn, J. B. Buxton, A. J. Ewins