| Reference number | Title | Date |
| GLB/65/22/12 | Harold King, West Parley, Dorset to Brown | 12 June 1955 |
| IM/002533 | King, Harold | nd |
| GLB/65/22/11 | Brown to Harold King, West Parley, Dorset | 8 June 1955 |
| RR/64/86 | Referee's report by Frank Lee Pyman, on two papers 'Antiplasmodial action and chemical constitution Part I. Cinchona alkaloidal derivatives and allied substances' by Arthur Cohen and Harold King, and 'Antiplasmodial action and chemical constitution Part II. Some simple synthetic analogues of quinine and cinchonine' by A D Ainley and Harold King | 10 December 1937 |
| RR/67/417 | Referee's report by Harold King, on a paper 'Plant pigments in the Galápagos Islands' by T W J Taylor | 30 April 1940 |
| RR/70/230 | Referee's report by Harold King, on a paper 'Studies on the antibacterial properties of some basic derivatives of cholane and norcholane' by Maurice Stacey and M Webb to D C Martin, Assistant Secretary of the Royal Society | 10 March 1947 |
| RR/67/48 | Referee's report by Harold King, on a paper 'Molecular structure in relation to oestrogenic activity: derivatives of 4 :4’-dihydroxydiphenylmethane' by N R Campbell | 9 September 1940 |
| RR/68/29 | Referee's report by Harold King, on a paper 'Molecular structure in relation to oestrogenic activity: polynuclear analogues of Y:d-di-(4-hydroxyphenyl)-n-hexane (‘hexoestrol’)' by N R Campbell and F W Chattaway | 26 September 1941 |
| RR/70/228 | Referee's report by Harold King, on a paper 'Studies on the antibacterial properties of the bile acids and some compounds derived from cholanic acid' by Maurice Stacey and M Webb | 10 March 1947 |
| RR/68/428 | Letter to Arthur James Ewins, regarding a paper 'Experimental chemotherapy of typhus Anti-rickettsial action of p-sulphonamidobenzamidine and related compounds' by Christopher Howard Andrewes, Harold King and James Walker | 16 February 1945 |
| RR/70/229 | Letter from Harold King, on a paper 'Studies on the antibacterial properties of some basic derivatives of cholane and norcholane' by Maurice Stacey and M Webb to D C Martin, Assistant Secretary of the Royal Society | 27 March 1947 |
| RR/68/427 | Referee's report by Arthur James Ewins, on a paper 'Experimental chemotherapy of typhus Anti-rickettsial action of p-sulphonamidobenzamidine and related compounds' by Christopher Howard Andrewes, Harold King and James Walker | [1945] |
| RR/68/425 | Memoranda, on a paper 'Experimental chemotherapy of typhus Anti-rickettsial action of p-sulphonamidobenzamidine and related compounds' by Christopher Howard Andrewes, Harold King and James Walker | 4 January 1945 |
| RR/68/429 | Letter from Arthur James Ewins, regarding a paper 'Experimental chemotherapy of typhus Anti-rickettsial action of p-sulphonamidobenzamidine and related compounds' by Christopher Howard Andrewes, Harold King and James Walker | 20 February 1945 |
| RR/68/426 | Referee's report by Charles Halliley Kellaway, on a paper 'Experimental chemotherapy of typhus Anti-rickettsial action of p-sulphonamidobenzamidine and related compounds' by Christopher Howard Andrewes, Harold King and James Walker | [1945] |
| RR/71/167 | Referee's report by Charles Halliley Kellaway, on a paper 'Antiplasmodial action and chemical constitution IX. Carbinolamines derived from 6:7-dimethylquinoline' by Harold King and Jean Wright | [1948] |
| EC/1933/09 | King, Harold: certificate of election to the Royal Society | |
| HD/25/21 | Presentation album for Henry Dale on his retirement from the National Institute for Medical Research | 30 September 1942 |
| RR/64/4 | Referee's report by Harold King, on a paper 'Molecular structure in relation to oestrogenic activity. Compounds without a phenanthrene nucleus' by Edward Charles Dodds and W Lawson | 5 January 1938 |
| RR/74/4 | Referee's report by Charles Halliley Kellaway, on a paper 'Amoebicidal action and chemical constitution' by J D Fulton, L P Joyner, Harold King, J M Osbond and Jean Wright | 2 March 1950 |
| RR/74/6 | Referee's report by Neil Hamilton Fairley, on a paper 'Amoebicidal action and chemical constitution' by J D Fulton, L P Joyner, Harold King, J M Osbond and Jean Wright | 24 March 1950 |
| RR/74/5 | Letter from Neil Hamilton Fairley, on a paper 'Amoebicidal action and chemical constitution' by J D Fulton, L P Joyner, Harold King, J M Osbond and Jean Wright, to D C Martin | 24 March 1950 |