Copy letter from David Prain, Treasurer and Vice President of the Royal Society; to Messrs L. Messel & Co.; 31 Throgmorton Street, E.C.2. Refers to the £55,000 Treasury Bills that Messrs L. Messel & Co. have purchased on behalf of the Society and asks that, once that transaction is completed, they hand over the securities to the Society's bankers, Messrs Coutts & Co. 23 March 1921