Copy letter from Robert William Frederick Harrison to Messrs Baird & Tatlock, 14 Cross Street, Hatton Garden, EC 'With reference to your memordandum of accounts outstanding in respect of material supplied to Sir David Bruce, Director of the Nyasaland [Malawi] Sleeping Sickness Commission, we do not seem to have the account entered as "June 6, 1912, £6.2.6." The best course would be to render the bill again to Sir David Bruce, requesting him to initial it for payment, if correct, and transmit to the Royal Society.' 18 December 1912