Letter from Arthur Compton, Laboratoire de M. Gabriel Bertrand, Institut Pasteur, 28 Rue Dutot, Paris, to the Assistant Secretary, the Royal Society, Burlington House Expressing disappointment at the lack of renewal of his Mackinnon Studentship for a third year. He was depending upon it and concludes that if Council, after 'careful consideration' did not renew, his work has been found wanting. He feels that this is unwarranted. 18 July 1921