of 34-36 Grays Inn Road, London, WC1.
1924 Dissolution of partnership between Sidney Mortimer Kirk, Percy Kirk and Sidney Arnold, carrying on business as Wholesale and Manufacturing Opticians; the business was continued by Sidney Mortimer Kirk and Percy Kirk
1929 Advert in British Industries Fair Catalogue as an Optical, Scientific and Photographic Exhibit. (Scientific Section - Stand No. O.28) 
Sources of Information
- London Gazette 18 March 1024
- 1929 British Industries Fair Advert p123