Letter from H.K. Lewis, Medical Publisher, Medical & Scientific Circulating Library, 136 Gower Street, and 24 Gower Place, London, W.C, to The Secretary, Royal Society, Burlington House, W Requests credit for four copies of Proceedings No. 188 (June 20th, 1878) returned by a customer who refused payment. Proposes crediting the amount against future purchases, emphasising the value of credit over cash return. Additionally, requests Volume 82 Section B. 3 November 1910