Letter from Steven Stewards, University of London British Postgraduate Medical School, Hammersmith Hospital LCC, Ducane Road, Shepherd's Bush London W12, to Henry Barcroft, [Queen's University, Belfast] Is enclosing a needle 'of the type we have been using...I should doubt there would ever be a resulting hematoma' - has asked Drs McMichael and Schafer about it. 8 January 1946