Consists of typed manuscripts, often heavily revised or corrected, of Mussey's English translations of various works, mostly novels, of German and other European authors during the 1940s. Included are Frans G. Bengtsson's Red Orm (incomplete); Hermann Borchardt's The Conspiracy of Carpenters; Dola de Jong's Knikkernik, Knakkernak, and Knokkernok (several chapters); Anthony Fokker and Frank Harper's Specialized in Terror; Heinrich Hauser's Time Was; Frederick Heydenau's The Wrath of the Eagles; Hugo von Hofmannsthal's Plays at Salzburg; Hermann Kesten's Colonel Kock; Christine Liungman's The Shining Sea; Ernst Lothar's Beneath Another Sun and A Woman is Witness; Emil Ludwig's Mediterranean; Gerardo E. Neisser's Call Me Frank; and Hermann Rauschning's The Redemption of Democracy.

In addition, the collection includes Fritz von Unruh's untitled 1941 novel, as well as Franz Werfel's Jacobowsky and the Colonel and A Portrait of Giuseppe Verdi. Some of Mussey's translations were apparently never published. "Translators and Traitors," Mussey's article describing his experiences as a translator, rounds out the collection.

The following standard abbreviation, or its variations, is used to identify materials in this collection: ALS = autograph letter signed, TLS = typed letter signed, TMs = typed manuscript, TMsS = typed manuscript signed.