| RefNo | Title | Source |
| DF/ENT/340/20/6 | Satchell - Saunders | |
| DF/ENT/340/19/1 | Rothschild, Dr Honorable Miriam Luisa (Miriam Lane) (I) | |
| DF/ENT/340/13/2 | Landauer, Dr Eric | |
| DF/ENT/340/6/11 | Farren - Fay | |
| DF/ENT/340/8/17 | Hsu - Humphreys | |
| DF/ENT/340/17/1 | Pfitzer - Phillips | |
| DF/ENT/340/11/8 | Jeekel - Jirovec | |
| DF/ENT/340/4/18 | Dandridge - Davey | |
| DF/ENT/340/23/13 | Toumanoff, Prof C | |
| DF/ENT/340/18/17 | Ross - Rossen | |
| DF/ENT/340/7/7 | Greer - Grenier | |
| DF/ENT/340/15/10 | Muesebeck, Dr Carl Frederick William | |
| DF/ENT/340/4/17 | Dampf Jenson, Dr Alfonso | |
| DF/ENT/340/26/5 | Winding - Witherby | |
| DF/ENT/340/26/16 | British Museum (Clay, Theresa Rachel) | |
| DF/ENT/340/20/16 | Seidl - Seytre | |
| DF/ENT/340/16/18 | Peus, Prof Dr Fritz (1904-1978) (I) | |
| DF/ENT/340/20/19 | Shaw - Shu | |
| DF/ENT/340/16/8 | Ordish - Osborn | |
| DF/ENT/340/23/4 | Thompson, Gordon B | |
| DF/ENT/340/4/16 | Dabbene -Dammers | |
| DF/ENT/340/22/11 | Tcherniac - Teagle | |
| DF/ENT/311/78 | Jordan, K H C: Contributions to our knowledge of the morphology and systematics of the Polyctenidae, a family of Rhychota parasitic on bats | |
| DF/ENT/340/1/9 | Austen, Major Ernest Edward | |
| DF/ENT/340/11/10 | Jordan, Dr Heinrich Ernst Karl | |
| DF/ENT/340/11/17 | Jellison, Dr William Livingston (I) | |
| DF/ENT/340/25/22 | Watt - Weeks | |
| DF/ENT/340/2/1 | Barrera, Prof Dr José Maria de la (I) | |
| DF/ENT/340/11/18 | Jellison, Dr William Livingston (II) | |
| DF/ENT/340/20/21 | Shute, Dr P G | |
| DF/ENT/340/10/2 | Hubbard, Professor Dr Clarence Andresen (II) | |
| DF/ENT/340/30/9 | Smit letters/ MSS (III) | |
| DF/ENT/340/25/12 | Waage - Wag | |
| DF/ENT/340/13/18 | Lima - Linardi | |
| DF/ENT/340/8/11 | Hope - Hopwood | |
| DF/ENT/340/9/1 | Holland, George P (I) | |
| DF/ENT/340/17/2 | Phillips, Major William Watt Addison (1892-1981) (I) | |
| DF/ENT/340/20/27 | Smit, FGAM | |
| DF/ENT/340/15/5 | Mofidi, Dr Chamseddine M H | |
| DF/ENT/340/8/2 | Hatchards - Haydock | |
| DF/ENT/340/18/1 | Radford, Charles Denys | |
| DF/ENT/340/20/17 | Shannon - Shapiro | |
| DF/ENT/340/14/15 | Mariani - Marshall | |
| DF/ENT/340/16/4 | O'Mahony, Eugene (National Museum of Ireland, Dublin) | |
| DF/ENT/340/12/11 | Kleinhont - Kloss | |
| DF/ENT/340/21/2 | Soper, Dr Fred L | |
| DF/ZOO/235/1/4/1/35 | Jordan, Dr Karl | |
| DF/ENT/340/10/1 | Hubbard, Prof Dr Clarence Andresen (I) | |
| DF/ZOO/200/132/33 | Jordan, Dr | |
| DF/PAL/100/144/2 | Jordan, Karl | |
| DF/ADM/1004/219 | Collections: Karl Jordan's 21,420 specimens of Anthribae | |
| DF/ENT/340/10/14 | Istvan - Iyengar | |
| DF/ENT/340/8/7 | Hibbard - Hilton | |
| DF/ENT/340/5/4 | Dreyfus - Dyatlova | |
| DF/ENT/340/25/14 | Wagner, Fritz | |
| DF/ENT/340/21/15 | Stuckland - Stuardo | |
| DF/ENT/340/14/17 | Marshall, Sir Guy A K | |
| DF/ENT/340/14/3 | Loveridge, Dr Arthur | |
| DF/ENT/340/16/16 | Pax, Professor Dr Ferdinand | |
| DF/ENT/340/9/3 | Holland, George P (III) | |
| DF/ENT/340/7/21 | Hamson - Hase | |
| DF/ENT/340/24/9 | Traub, Dr Colonel S Robert (IX) | |
| DF/ENT/340/15/19 | Natvig, Dr Leif R | |
| DF/ENT/340/15/8 | Mottaz - Mrciak | |
| DF/ENT/340/20/26 | Slais - Smit | |
| DF/ENT/340/10/10 | Ioff, Prof Dr I (I) | |
| DF/ENT/340/2/14 | Bernard - Besuchet | |
| DF/ENT/340/23/16 | Tuxen, Dr S L (I) | |
| DF/ENT/340/10/11 | Ioff, Prof Dr I (II) | |
| DF/ENT/340/15/4 | Mimeur - Mitzmain | |
| DF/ENT/340/25/26 | Whitehead, W E | |
| DF/ENT/340/8/14 | Hoerning - Houhold | |
| DF/ENT/332/3/10/1 | Jordan, Dr Karl | |
| DF/ENT/340/25/16 | Walder - Walker | |
| DF/ENT/340/21/12 | Still - Stott | |
| DF/ENT/340/2/7 | Begg - Behr | |
| DF/ENT/340/6/3 | Eyndhoven, Dr G L van | |
| DF/TM/1/43/25 | Correspondence J: Johnson; Johnston; Jordan; Jourdan & Co | |
| DF/ENT/340/26/9 | Yarrow - Yemelyanova | |
| DF/ENT/340/4/3 | Clark - Clarke | |
| DF/ENT/340/12/13 | Kopstein, Dr Felix | |
| DF/ENT/340/4/14 | Cova - Crowcroft | |
| DF/ENT/340/2/12 | Berg-Berl items | |
| DF/ENT/340/4/12 | Corbet - Cottee | |
| DF/ENT/340/3/18 | Chauvin - Chubt | |
| DF/ENT/340/9/2 | Holland, George P (II) | |
| DF/ENT/340/7/9 | Griffin - Guerrero | |
| DF/ENT/340/25/1 | Traub, Dr Colonel S Robert (XIII) | |
| DF/ENT/340/14/20 | Matheson, Colin | |
| DF/ENT/340/24/7 | Traub, Dr Colonel S Robert (VII) | |
| DF/ENT/340/14/1 | Llanos - Loosjes | |
| DF/ENT/340/16/12 | Parker, Dr R R | |
| DF/ENT/340/18/7 | Reveille - Reynold | |
| DF/TR/1/1/26/286 | [Jordan], [Karl?] | |
| DF/TRI/3000/7/18 | Officer in Charge - J E Dandy. Superintendent - C L Rance | |
| DF/ENT/340/1/14 | Baker, Prof Charles Fuller | |
| DF/ENT/340/8/19 | Hungerford, Prof Herbert B | |
| DF/ENT/340/13/17 | Chen, Prof Li Kuei- | |
| DF/ENT/340/7/18 | Haffkine - Hamptons | |
| DF/ENT/340/18/9 | Richards - Ringelke | |
| DF/ENT/340/1/18 | Balsac, Henri Heim de | |
| DF/ENT/340/24/2 | Traub, Dr Colonel S Robert (II) | |
| DF/ENT/340/1/21 | Bartels - Basilewsky | |
| DF/ENT/340/21/22 | Sway - Synes | |
| DF/ENT/340/27/7 | British Museum (Riley, Norman Denbigh) | |
| DF/ENT/340/16/5 | Oman - Ontario | |
| DF/ENT/340/20/4 | Saeger - Sandro | |
| DF/ENT/340/21/10 | Stephens - Steyn | |
| DF/ENT/340/21/9 | Stationery - Steinwender | |
| DF/ZOO/235/1/1/5/129 | Jordan, Karl | |
| DF/ZOO/232/5/17/10/7 | Jordan, Karl | |
| DF/ZOO/232/6/8/4/18 | Jordan, K. | |
| DF/ZOO/232/6/13/9/5 | Jordan, Dr K | |
| DF/ZOO/232/5/13/8/7 | Jordan, K. | |
| DF/ZOO/235/1/1/6/116 | Jordan, Karl | |
| DF/ZOO/235/1/4/1/59 | Jordan, Dr Karl | |
| DF/ENT/340/6/4 | Eyerdam, Walter J | |
| DF/ENT/340/9/7 | Hopkins, George Henry Evans (II) | |
| DF/ZOO/200/47/224 | Jordan, [Heinrich Ernst Karl] | |
| DF/ZOO/200/48/354 | Jordan, [Heinrich Ernst Karl] | |
| DF/ENT/340/9/6 | Hopkins, George Henry Evans (I) | |
| DF/ENT/340/9/8 | Hopkins, George Henry Evans (III) | |
| DF/ENT/340/6/14 | Fourie, Dr L C | |
| DF/ENT/340/7/20 | Harrison, Dr David L | |
| DF/ENT/340/6/19 | The British Fumigants Company Ltd | |
| DF/ENT/340/1/10 | Austin - Avinoff | |
| DF/ENT/340/1/20 | Barrera, Prof Dr Alfredo | |
| DF/ENT/340/2/11 | Bequaert, Prof Joseph (Department of Tropical Medicine, Harvard University Medical School) | |
| DF/ENT/340/5/5 | Dunnet, George MacKenzie (I) | |
| DF/ENT/340/5/13 | Eidmann, Prof Dr H A | |
| DF/ENT/340/5/3 | Doane - Dowson | |
| DF/ENT/340/5/10 | Easton - Edwards | |
| DF/ENT/340/12/12 | Knight - Kolokotina | |
| DF/ENT/340/12/18 | Kunitskaya - Kuyp | |
| DF/ENT/340/8/5 | Healey - Helsdingen | |
| DF/ENT/340/12/5 | Kadarsan - Kaschef | |
| DF/ENT/340/6/18 | Fuller, Dr Henry Shepard | |
| DF/ENT/340/6/13 | Fock - Forward | |
| DF/ENT/340/14/19 | Martin - Mason | |
| DF/ENT/340/12/8 | Kiefer - Kissileff | |
| DF/ENT/340/11/12 | Jameson, Dr E (Bill) W, Jr (I) | |
| DF/ENT/340/15/12 | Musco - Mysterud | |
| DF/ENT/340/16/2 | Nuttall, Prof George Henry Falkiner | |
| DF/ENT/340/15/3 | Mikhailov - Milner | |
| DF/ENT/340/15/20 | Naval - Neghme | |
| DF/ENT/340/24/5 | Traub, Dr Colonel S Robert (V) | |
| DF/ENT/340/21/3 | Sordelli - Sowerby | |
| DF/ENT/340/18/14 | Ronald - Rosenfeld | |
| DF/ENT/340/23/14 | Townsend - Trpis | |
| DF/ENT/340/25/18 | Wallis - Wasserburger | |
| DF/ENT/340/26/1 | Wickham - Wilkinson | |
| DF/ENT/340/26/8 | Wright - Wytsman | |
| DF/ENT/340/26/12 | Zimmerman - Zwilling | |
| DF/ENT/332/1/90 | Norman D Riley papers: American Museum of Natural History: certificates of Corresponding Membership for N D Riley and Karl Jordan | |
| DF/ZOO/232/5/15/9/8 | Jordan, K. | |
| DF/ENT/340/16/3 | Oakley - Olsson | |
| DF/ENT/340/20/3 | Ryckmann - Rysavy | |
| DF/ENT/340/4/15 | Cullen - Cyprich | |
| DF/ENT/340/22/9 | Taylor, Frank H | |
| DF/ENT/340/21/11 | Stiles, Prof Charles Wardell | |
| DF/TRI/3000/7/17 | Officer in Charge - J E Dandy. Superintendent - C L Rance | |
| DF/ENT/340/17/15 | Quackenbush - Quivira | |
| DF/ENT/340/23/11 | Titschak, Prof Dr Erich | |
| DF/ENT/340/14/13 | Mail - Marcus | |
| DF/ENT/340/1/23 | Bayley - Bayreuther | |
| DF/ENT/340/4/9 | Congress - Cooke | |
| DF/ENT/340/8/6 | Hemingway - Heyligers | |
| DF/ENT/340/17/13 | Prince, Dr Frank M | |
| DF/ENT/340/13/1 | Lach - Lampshades | |
| DF/ENT/340/15/14 | Meillon, Dr Botha de (II) | |
| DF/ENT/340/14/8 | Maassen - Macciavello | |
| DF/ENT/340/26/3 | Wilson | |
| DF/ENT/340/21/4 | Spectrum - Sprague | |
| DF/ENT/340/20/22 | Shvarts - Sjostedt | |
| DF/ZOO/232/5/20/9/5 | Jordan, Doctor K. | |
| DF/ENT/340/11/5 | Jameson, E W Jr | |
| DF/TRI/3000/7/19 | Officer in Charge - J E Dandy. Superintendent - C L Rance | |
| DF/ENT/340/26/7 | World Health Organisation (Switzerland) | |
| DF/ENT/340/1/11 | Allan, Ronald M (I) | |
| DF/ENT/340/15/11 | Mucino - Murzakhmetova | |
| DF/ENT/340/22/12 | Tervuren Museum (Koninklijk Museum van Belgisch Congo, Musée Royal du Congo Belge) (I) | |
| DF/ENT/340/8/9 | Ho - Honour | |
| DF/TM/1/35/18 | Correspondence J: Jardin Zoologique; Jones; Jordan; Jefferys; Jurgens | |
| DF/ENT/340/3/14 | Buxton, Prof Patrick Alfred | |
| DF/ENT/340/17/10 | Pinhey - Pluthero | |
| DF/ENT/340/18/13 | Romer, J D | |
| DF/ENT/340/26/15 | British Museum (China, Dr William Edward) | |
| DF/ENT/340/23/15 | Tunis - Tutein | |
| DF/ENT/340/21/7 | Stark, Dr Harold E (I) | |
| DF/ENT/340/20/13 | Scott - Skuratowicz | |
| DF/ENT/340/8/8 | Hincks - Hither Green | |
| DF/ENT/340/25/6 | Veen - Vevers | |
| DF/ENT/340/14/25 | Meinertzhagen - Meloni | |
| DF/ENT/340/18/19 | Roth - Rozen | |
| DF/ENT/340/26/6 | Wodzicki - Wooster | |
| DF/ENT/340/16/13 | Parkinson - Patton | |
| DF/ENT/340/30/10 | Smit letters/ MSS (IV) | |
| DF/ENT/340/15/13 | Meillon, Dr Botha de (I) | |
| DF/ZOO/200/44/221 | Jordan, [Heinrich Ernst Karl] | |
| DF/ENT/340/3/17 | Chabaud - Charleston | |
| DF/ENT/340/15/7 | Morad - Morrison | |
| DF/ENT/340/25/5 | Valenti - Vasquez | |
| DF/ENT/340/7/2 | Giacomelli - Glumac | |
| DF/ENT/340/19/3 | Rothschild, Dr Honorable Miriam Luisa (Miriam Lane) (III) | |
| DF/ENT/340/20/12 | Schramm - Schwan | |
| DF/ENT/340/14/7 | Lumsden - Lyon | |
| DF/ZOO/232/6/10/9/6 | Jordan, Doctor K. | |
| DF/ENT/340/8/12 | Horn, Dr Walther | |
| DF/ENT/340/5/9 | Eads, Dr Richard B | |
| DF/ENT/340/1/4 | Aldrich - Altman | |
| DF/ENT/340/1/15 | Baker - Bale | |
| DF/ENT/340/1/13 | Baars - Baker | |
| DF/ENT/340/3/15 | Byram - Capra | |
| DF/ENT/340/6/15 | Fox, Dr Caroll | |
| DF/ENT/340/6/12 | Fearnley - Flux | |
| DF/ENT/340/15/6 | Mogensen - Moore | |
| DF/ENT/340/17/5 | Pickering - Pierre | |
| DF/ENT/340/20/28 | Smith - Snow | |
| DF/ENT/340/26/2 | Willemse - Wilner | |
| DF/ENT/302/12 | Entomology out-letters, carbon-copy book | |
| DF/ENT/340/21/20 | Sueur - Suyemoto | |
| DF/ZOO/232/6/14/8/8 | Jordan, Dr K | |
| DF/ENT/340/15/26 | Noodt - Nortin | |
| DF/ZOO/232/6/15/8/8 | Jordan, Karl | |
| DF/ENT/302/9 | Entomology out-letters, carbon-copy book | |
| DF/ENT/302/11 | Entomology out-letters, carbon-copy book | |
| DF/ENT/302/6 | Entomology out-letters, carbon-copy book | |
| DF/ENT/302/5 | Entomology out-letters, carbon-copy book | |
| DF/ENT/340/24/3 | Traub, Dr Colonel S Robert (III) | |
| DF/ENT/340/5/18 | Encalade - England | |
| DF/ENT/340/24/6 | Traub, Dr Colonel S Robert (VI) | |
| DF/ENT/340/24/1 | Traub, Dr Colonel S Robert (I) | |
| DF/ENT/340/21/21 | Svihla, Dr Ruth Dowdell & Arthur | |
| DF/ENT/340/25/7 | Vickers - Violovich | |
| DF/ENT/340/30/7 | Smit letters/ MSS (I) | |
| DF/ENT/340/4/22 | Davies, David H S (I) | |
| DF/ENT/340/8/4 | Haynes - Hazell | |
| DF/ENT/302/4 | Entomology out-letters, carbon-copy book | |
| DF/ENT/302/7 | Entomology out-letters, carbon-copy book | |
| DF/ENT/340/1/1 | Abbott - Adlard | |
| DF/ENT/340/1/3 | Aeschlimann - Akademii | |
| DF/ENT/340/1/6 | Amaru - Ansari | |
| DF/ENT/340/1/7 | Arata - Assuricao | |
| DF/ENT/340/2/9 | Bell - Bentinck | |
| DF/ENT/340/2/5 | Beaumont - Beer | |
| DF/ENT/340/2/17 | Bishop - Blickle | |
| DF/ENT/340/3/1 | Board - Borough | |
| DF/ENT/340/3/3 | Box - Brimley | |
| DF/ENT/340/3/7 | British - Britt | |
| DF/ENT/340/3/9 | Bronswijk - Bueno | |
| DF/ENT/340/3/11 | Buncle - Butterfield | |
| DF/ENT/340/3/16 | Careers - Cerny | |
| DF/ENT/340/4/6 | Cockerell - Collins | |
| DF/ENT/340/5/1 | Department - Devignat | |
| DF/ENT/340/5/12 | Eichler, Prof Dr Wolfdietrich | |
| DF/ENT/340/5/16 | Eley - Emelyanova | |
| DF/ENT/340/6/2 | EOS - Ewing | |
| DF/ENT/340/6/5 | "Ectoparasites", correspondence A-J | |
| DF/ENT/340/6/6 | 'Ectoparasites', correspondence L-W | |
| DF/ENT/340/6/16 | Fox, Prof Irving | |
| DF/ENT/340/6/17 | Franklin - Fuhes | |
| DF/ENT/340/7/1 | Gaaboub - Ghidini | |
| DF/ENT/340/7/3 | Goat - Gowing | |
| DF/ENT/340/7/19 | Hanney - Harris | |
| DF/ENT/340/12/7 | Kawazoe - Keymer | |
| DF/ENT/340/12/16 | Krass - Kulkarni; Luehlewein | |
| DF/ENT/340/13/5 | Larson - Layne | |
| DF/ENT/340/13/10 | Lendl - Lewis | |
| DF/ENT/340/13/20 | Lindgren - Liston | |
| DF/ENT/340/14/21 | Matile - Mayer | |
| DF/ENT/340/14/22 | McArthur - McRobert | |
| DF/ENT/340/15/24 | Newsholme - New Zealand | |
| DF/ENT/340/16/17 | Pazos - Petrides | |
| DF/ENT/340/18/10 | Robert - Rolston | |
| DF/ENT/340/20/10 | Schaper - Scholten | |
| DF/ENT/340/22/6 | Tandan - Tauber | |
| DF/ENT/340/24/4 | Traub, Dr Colonel S Robert (IV) | |
| DF/ENT/340/25/4 | Uchida - Uvarov | |
| DF/ENT/340/25/15 | Wagner, Prof Dr N Julius | |
| DF/ENT/340/25/24 | Weir - Wettstein | |
| DF/ZOO/255/1/1/6 | Bohls, J (Germany) | |
| DF/ENT/302/8 | Entomology out-letters, carbon-copy book | |
| DF/ENT/340 | Custodian of the Rothschild Collection of Siphonaptera, Correspondence and Papers | |
| DF/ZOO/200/45/236-238 | Jordan, [Heinrich Ernst Karl] | |
| DF/ZOO/200/51/132-134 | Jordan, [Heinrich Ernst Karl] | |
| DF/TR/1/1/29/348 | Jordan, Karl | |
| DF/ENT/340/16/10 | Osgood - Oxford | |
| WP/1/6/3 | Fred Birch to Alfred Russel Wallace from Theophilo Ottoni, Brazil | |
| DF/ENT/340/15/22 | Nelson - Newland | |
| WP/1/1/202 | Letter from Alfred Russel Wallace to his son William Wallace, from Broadstone, Dorset | |
| DF/TM/1 | Tring Museum: in-letters | |
| DF/TM/2 | Tring Museum: In-letters and copy-out letters | |