Label source: (Letter 437, 1919 : xiii.p. 97.) Gutta Percha Company (Branch of the Telegraph Construction & Maintenance Co. Ltd.) Wharf Road, City Road, London, N.1 24th Nov. 1919. Royal Botanic Gardens, Kew. Sir, I have pleasure in sending herewith a pi, ece of the gum extracted from Eucommia ulmoides branches and twigs of which you so kindly gave me on the 30th ult. The gum is present in the twigs, taken as a whole, to the extent of 1.14% and in the bark or skin of the branches it amounts to 0.87%. I als, o send a sample of the bark from a tree grown in China, which may be of interest to you. I shall feel extremely obliged if you will be good enough to inform me of the probable age of such a tree. Thanking you for your attention in this matter. Signed H.J, .Garnett.