(Sir Donald, 1854-1934, President of the General Medical Council, 1904-1931, Principal of Glasgow University 1907-1929, from 1924 1st Bt.)
Autograph letter signed to J. Wells,
regretting he will not be free in Sept[emb]r to accept his invitation, but wishing him all success in your work, 1 side 7 x 4½, Medical Council Office, 299 Oxford Street, London, 12th July