Consists primarily of Morley manuscripts, letters, galley proofs, and miscellany. Most of the collection is comprised of both autograph and typed manuscripts, the majority of which are signed by the author. Manuscripts of essays include "A Brief Case," "Off the Deep End," and "The Century." There are also two autograph manuscripts of verse, "Of a Child That Had a Fever" and "A Basement Love Song." Among the galley proofs are The Case of Bouck White and Internal Revenue; the latter has been corrected by the author. In addition, there is Armstrong correspondence concerning his acquisition of the Morley material, and page proofs of Alfred P. Lee's A Bibliography of Christopher Morley.

The following standard abbreviations, or their variations, are used to identify materials in this collection: ALS = autograph letter signed, TLS = typed letter signed, AMsS = autograph manuscript signed, and TMsS = typed manuscript signed.