Ffeil UCC/P/L&P/4. - Letter sent 6 Jan 1916,

Letter from A. K. Keen, General Manager of Guest Keen and Nettlefolds Ltd., Dowlais Cardiff Works to Mr R. H. Greaves, in support of Greaves' application for exemption from call up. Confirms that the work of the Metallurgical Department, under Greaves' charge, has 'rendered us valuable scientific assistance in connection with the micography of steel bearing on our industrial practice', and hopes this work will not be interrupted (i.e. by Greaves' potential call up). A note indicates that a copy of the letter was sent to the Royal Society and to Sir Selby-Bigge).