Copy letter from Robert William Frederick Harrison, to Leslie S Robertson, Secretary, The Engineering Standards Committee, 28 Victoria Street, S.W. 'Dear Sir, Referring to your letter of June 6th., the Proceedings of the Royal Society containing the paper by Dr P E Shaw, can be obtained of Messrs Harrison & Sons, 45 St Martin's Lane, W.C. The paper appeared in Proceedings No. 518A. I am, faithfully yours, Assistant Secretary R.S. [Royal Society]'. 8 June 1906