Correspondence, manuscripts, diaries, commonplace books, drawings, photographs, and printed materials. The collection is a comprehensive documentation of the dramatist's career and includes manuscripts, typescripts, notes, and costume and scenic design for more than seventy of his plays and related writings; 31 diaries, commonplace books, and scrapbooks containing manuscript and typescript notes, travel sketches, original drawings, and photographs; and correspondence files including letters from Harley Granville-Barker, Sir Herbert Beerbohm-Tree, John Galsworthy, Booth Tarkington, and Thornton Wilder. Austin Strong's mother, Isobel Field, was the step-daughter of Robert Louis Stevenson. Consequently, the collection contains much Stevensoniana, including photographs and Isobel Field's letters from Western Samoa, where she was known as "Teuila." Also, correspondence and photographs relating to Cornwall Park, Auckland, New Zealand, which was designed by Austin Strong.

Correspondence, documents, memorabilia, photographs, original drawings, sketches and studies, and printed materials of Thompson. Correspondence, mostly uncataloged, relating to purchases made in Spain, France, and Italy during 1928; documents; memorabilia; photographs; printed material including publicity, books, engravings, and reproductions; an illustration file containing source illustrations for architectural details, costumes -- subdivided by century, country, societal role, sex, age, and by countries, crafts, painting, styles, etc., and including some original Thompson drawings; a production file containing related correspondence and documents; miscellaneous commissioned projects; and Thompson Studies, including studies done by Thompson, his work as a student, and materials pertaining to his activities as a teacher.