Stein's papers consist of:
- Letters to P.S. Allen and Helen Allen, 1898-1943
- Correspondence with F.H. Andrews, 1899-1943
- General correspondence
- Family correspondence
- Notebooks, field diaries, personal diaries and 'personal narratives', 1889-1943
- Miscellaneous and personal papers, including catalogue of Stein's library
- Correspondence and papers concerning expeditions, mainly in Central Asia, and to archaeology and survey work in India
- Drafts of, and papers and correspondence concerning, publications
- Maps and photographs