1. La France Libre (magazine) 1, 2
2. Labarthe, André 1, 2
3. Lacoste, René 1
4. Lang, Ira 1, 2, 3
5. Lawrence, D. H. 1
6. Layton, Sir Walter 1
7. League of Nations 1, 2, 3, 4, 5
8. Lecoutre, Marthe 1, 2
9. Leeper, Rex 1
10. Lefevre, Earnest 1
11. Lefevre, Nina 1
12. Lemmens, Jan 1, 2
13. Lenin, Vladimir Ilyich 1, 2, 3, 4, 5, 6
14. Lewis, Brigitte 1
15. Lewis, Cecil 1
16. Liddell, Captain Guy
    1. and atomic bombs 1, 2
    2. in Berlin 1
    3. and declaration of war 1
    4. and Franz Mariaux 1
    5. and Free French 1
    6. and German counterespionage section of MI5 1
    7. and Gustav Hilger 1
    8. and Horst Kopkow 1
    9. and Klop’s post-war operations 1, 2
    10. and Lisbon operatives 1, 2
    11. and Moura Budberg 1, 2
    12. and ‘Ostro’ 1
    13. overlooked for MI5 headship 1
    14. and potential German coup 1
    15. recruits Dick White 1
    16. recruits Klop 1
    17. and Richard Wurmann 1, 2, 3
    18. and Walter Krivitsky 1
    19. and Wilhelm Gessmann 1
17. Linklater, Magnus 1
18. Listowel, Lady 1
19. Lloyd, Richard Llewellyn 1
20. Lloyd George, David 1, 2
21. Lobkowitz, Maxmillian 1
22. Locker-Lampson, Godfrey 1
23. Lockhart, Robert Bruce 1, 2, 3, 4, 5, 6, 7, 8, 9
24. Lombardi, Vera 1
25. Loxley, Peter 1, 2
26. Ludwig, Otto 1, 2
27. Luftstreitkräfte (German army’s air force) 1
28. Luftwaffe (German air force) 1