Copy letter from A H White, to Messrs Clay & Sons, Cambridge 'Dear Sirs, Will you please prepare for us a cliché of the following woodcut - Sir William Thomson, Mathematical and Physical Papers Vol. 3 p.86, fig [figure] 16. We want this for a paper of Lord Kelvin's about to appear in our Proceedings & shd. [should] be obliged if you could let us have it in the course of a week or so. Yours faithfully A H White'. 10 August 1893