Letter from W. J. Coombe, War Office, London, to the Secretary, Royal Society, Burlington House, London Apologising for requesting further information, but the claimants' solictors desire to amend their claim on b-Eucaine manufacture, noting that an additional half-ton of acetal was produced according to their patent no.101428. It is unclear how much of this was used to produce the 200 pounds of b-Eucaine and he would be grateful for any assistance. The Minister of Health has been unable to furnish authentic information, including on the market price of b-Eucaine in the years 1914-1917. With enclosures. 30 October 1922