| RefNo | Title | Date |
| GLB/65/64/23 | Brown to W Feldberg, National Institute for Medical Research, Mill Hill | 9 September 1952 |
| GLB/73/16 | Laboratory notebook labelled W Feldberg 2 | February 1934 - April 1936 |
| GLB/65/35/27 | Brown to W Feldberg, National Institute for Medical Research, Mill Hill | 28 April 1958 |
| GLB/19/1/73 | W Feldberg, National Institute for Medical Research, Mill Hill to Brown | 7 February 1960 |
| MM/21/35 | Letter from Admiral Sir George Cockburn to Sir Richard Keats | 4 June 1830 |
| GLB/65/30/29 | W Feldberg, National Institute for Medical Research, Mill Hill to Brown | 21 November 1962 |
| GLB/65/30/30 | W Feldberg, National Institute for Medical Research, Mill Hill to Brown | 15 January 1963 |
| GLB/2/10 | Brown to W Feldberg, National Institute for Medical Research, Mill Hill | 28 April 1958 |
| GLB/65/30/31 | Brown to W Feldberg, National Institute for Medical Research, Mill Hill | 21 January 1963 |
| GLB/2/12 | W Feldberg, Montreux to Brown | 5 May 1958 |
| HD/25/23 | Photograph of guests at dinner in honour of 90th birthday of Henry Dale | 11 June 1965 |
| EC/1947/11 | Feldberg, Wilhelm Siegmund: certificate of election to the Royal Society | |
| IM/GA/WS/2876 | Feldberg, Wilhelm Siegmund | nd |
| GLB/2/9 | W Feldberg, National Institute for Medical Research, Mill Hill to Brown | 24 March 1958 |
| GLB/65/22/67 | Wilhelm Feldberg, National Institute for Medical Research, Mill Hill to Brown | 5 August 1970 |
| GLB/65/22/63 | Wilhelm Feldberg, National Institute for Medical Research, Mill Hill to Brown | 13 June 1969 |
| GLB/65/22/68 | Wilhelm Feldberg, Marsh Lane, London to Brown | 15 November 1970 |
| HD/25/21 | Presentation album for Henry Dale on his retirement from the National Institute for Medical Research | 30 September 1942 |