This collection primarily consists of correspondence of Anthony Trollope and various associates/family members. There are 122 autographed letters, which are mainly business-related in nature and discuss various aspects of the literary and publishing world. Notable correspondents include author Thomas Hughs, publisher Nicholas Trübner, journalist George W. Smalley, Russian novelist Ivan Turgenev, and the Scottish novelist Margaret Oliphant Wilson Oliphant. Additionally, the collection also contains autograph envelopes, notes, and documents. An unfinished holograph manuscript of Trollope's 1860 novel Castle Richmond, and a manuscript leaf of an article written by Henry James discussing Trollope (and later published in The Century Magazine, July 1883) are included as well.

There are several photographs and illustrations of Trollope in the collection, including an caricature of Trollope by French artist "Sem" [Georges Goursat (1863-1934)]. There is also a folder of printed ephemera connected to Trollope and his writing.

A group of related publications and printed editions of Trollope's work were also donated as part of the Rigby Collection. They will be cataloged and included in the Rare Book Division and the records will be available through Princeton University Library's catalog.