|Alternative reference number
|Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to James Ogilive Esquire; 2 St. Dunstan's Hill, E.C.3.
|19 April 1920
|Informs Mr. James Ogilive that he has been making enquiries with regards to his last letter, and suggests that an enquiry addressed to the National Health Insurance Commission might elicit the required information. Also notes that there are two firms manufacturing decolorising carbons: Messrs Thomas Hill-Jones Ltd. and Messrs George Haller & Co.