Letter from Jerry Jessop, Dept of Physiology, Schools of Surgery, Royal College of Surgeons in Ireland, Dublin, to Henry Barcroft Should like to see the Light apparatus if Barcroft is coming to Dublin - is glad that 'the investigation of our patient was not entirely a waste of time' - notes that Hamilton has had a patient 'who reacts to face powder in the same way that the last one did to tobacco'. 3 February 1948