Includes an alleged parish register, dated 1691, written over a circa-15th-century monk's chant; "La Marseillaise Chant Patriotique," a printed item written in French, 1848; a silk menu from a banquet held for "the president of the republic," 1898, also in French; and a printed booklet entitled, "Stories of the Operas Produced by the Metropolitan Opera Company" for the 1894-95 season. Morris gathered the items during his world travels.

Collection consists of published scores with accompanying manuscripts and/or photocopies of many of Robertson's works, as well as computer-burned sound recordings and a typewritten draft copy of Wilson's book, "Leroy Robertson: Music Giant from the Rockies," with annotations, circa 1930-2007.