| RefNo | Title | Date |
| GLB/65/14/20 | Harold Himsworth, Medical Research Council to Brown | 15 November 1961 |
| PB/9/1/53 | Correspondence with Sir Harold Himsworth | 1964 |
| GLB/49/2/2/49 | Brown to Harold Himsworth, Medical Research Council | 9 April 1968 |
| GLB/65/30/33 | Sir Harold Himsworth, Medical Research Council to Brown | 24 January 1963 |
| GLB/19/2/14 | Acknowledgement of Brown's letter of 25 February by H P Himsworth, Medical Research Council | 27 February 1967 |
| GLB/65/2/9 | Brown to Sir Harold Himsworth, Medical Research Council | 31 August 1964 |
| GLB/65/55/49 | Brown to Sir Harold Himsworth, Medical Research Council | 13 October 1964 |
| GLB/65/110/102 | Brown to Harold Himsworth, Medical Research Council | 25 November 1965 |
| GLB/65/110/99 | Brown to Harold Himsworth, Medical Research Council | 18 November 1965 |
| GLB/49/2/1/116 | Brown to Harold Himsworth, Medical Research Council | 18 November 1965 |
| GLB/65/55/50 | Harold Himsworth, Medical Research Council to Brown | 15 October 1964 |
| GLB/49/2/1/114 | Harold Himsworth, Medical Research Council to Brown | 10 November 1965 |
| GLB/44 | Medical Research Council, Sir Harold Himsworth | 1950-1970 |
| GLB/19/2/3 | Brown to Sir Harold Himsworth, Medical Research Council, London | 1 February 1967 |
| GLB/49/2/1/60 | Brown to Harold Himsworth, Medical Research Council | 13 April 1964 |
| GLB/49/2/2/48 | Harold Himsworth, Medical Research Council to Brown | 8 April 1968 |
| GLB/49/2/1/80 | Harold Himsworth, Medical Research Council to Brown | 7 December 1964 |
| GLB/49/6/1 | Harold Himsworth, Medical Research Council to Brown | 7 December 1965 |
| GLB/19/2/13 | Brown to Sir Harold Himsworth, Medical Research Council, London | 25 February 1967 |
| GLB/65/14/22 | Harold Himsworth, Medical Research Council to Brown | 28 November 1961 |
| GLB/49/2/1/58 | Brown to Harold Himsworth, Medical Research Council | 26 March 1964 |
| GLB/65/14/21 | Brown to Harold Himsworth, Medical Research Council | 24 November 1961 |
| GLB/65/17/2 | Brown to Sir Harold Himsworth, Medical Research Council | 22 May 1961 |
| GLB/65/2/13 | Brown to Harold Himsworth, Medical Research Council | 16 September 1964 |
| GLB/65/30/32 | Brown to Sir Harold Himsworth, Medical Research Council | 21 January 1963 |
| GLB/49/2/1/68 | Harold Himsworth, Medical Research Council to Brown | 5 June 1964 |
| GLB/65/30/43 | Brown to Harold Himsworth, Medical Research Council | 20 March 1963 |
| GLB/65/110/100 | Harold Himsworth, Medical Research Council to Brown | 22 November 1965 |
| GLB/65/65/4 | Harold Himsworth, Medical Research Council to Brown | 28 May 1952 |
| GLB/65/65/5 | Dr A Schweitzer to Harold Himsworth, Medical Research Council | 29 May 1952 |
| GLB/49/2/2/46 | Brown to Harold Himsworth, Medical Research Council | 1 April 1968 |
| GLB/49/2/1/4 | Harold Himsworth, Medical Research Council to Brown | 29 April 1960 |
| GLB/49/2/1/76 | Brown to Harold Himsworth, Medical Research Council | 13 August 1964 |
| GLB/49/6/13 | Harold Himsworth, Medical Research Council to Brown | 1 February 1966 |
| GLB/49/2/1/59 | Harold Himsworth, Medical Research Council to Brown | 7 April 1964 |
| GLB/49/2/2/23 | Brown to Harold Himsworth, Medical Research Council | 1 February 1967 |
| EC/1955/12 | Himsworth, Sir Harold Percival: certificate of election to the Royal Society | |
| IM/GA/AR/7186 | Himsworth, Sir Harold Percival | nd |
| HD/25/23 | Photograph of guests at dinner in honour of 90th birthday of Henry Dale | 11 June 1965 |
| GLB/49/2/1/71 | Brown to Harold Himsworth, Medical Research Council | 2 July 1964 |
| GLB/49/2/1/5 | Brown to Harold Himsworth, Medical Research Council | 5 May 1960 |
| GLB/49/2/1/70 | Harold Himsworth, Medical Research Council to Brown | 1 July 1964 |
| GLB/49/2/1/69 | Harold Himsworth, Medical Research Council to Brown | 9 June 1964 |
| GLB/49/2/1/89 | Brown to Harold Himsworth, Medical Research Council | 8 April 1965 |
| GLB/49/2/2/50 | Brown to Harold Himsworth, Medical Research Council | 10 April 1968 |
| GLB/49/6/2 | Brown to Harold Himsworth, Medical Research Council | 10 December 1965 |
| GLB/24/59 | Brown to Sir Harold Himsworth, Medical Research Council | 5 October 1954 |
| GLB/49/2/1/2 | Harold Himsworth, Medical Research Council to Brown | 12 April 1960 |
| GLB/49/2/1/79 | Brown to Harold Himsworth, Medical Research Council | 5 December 1964 |
| GLB/49/2/1/3 | Brown to Harold Himsworth, Medical Research Council | 26 April 1960 |
| GLB/49/2/2/29 | Brown to Harold Himsworth, Medical Research Council | 25 February 1967 |
| GLB/49/6/12 | Brown to Harold Himsworth, Medical Research Council | 28 January 1966 |
| GLB/49/2/2/26 | Harold Himsworth, Medical Research Council to Brown | 16 February 1967 |
| GLB/49/2/1/1 | Brown to Harold Himsworth, Medical Research Council | 4 April 1960 |