Autograph sketch for "Polish Christmas carol for children" composed in Bonn on July 20, 1907.

Handwritten sketch (piano/vocal score) for Movements III - VIII of Osterhymnae. Full score sketch in Box B, Folder 1, Item 1 in this collection.

Handwritten sketch for Movement II (a cappella chorus) of Osterhymnae. Full score sketch in Box B, Folder 1, Item 1 of this collection.

Autograph sketch, composed in Bonn, for the first part of the work in Box B, Folder 3, Item 7 in this collection.

Autograph sketch entitled "II Strophe", composed in Mainz in 1907, of an unused portion of the work in Box B, Folder 3, Item 7 in this collection.

Autograph score for an a cappella SATB choral piece set to a Reformation text; composed in Bonn.

Autograph score of an a cappella Ascension piece for mixed chorus using a melody from the time of the Reformation. Composed in February 1907. Related to Box B, Folder 3, Items 3 and 4 in this collection.

"Antiquarian bookshop and autograph shop [of] Heinrich Hinterberger." A catalog of Heinrich Schenker's library. The catalog is divided into three parts: I. Music; II. Musical Rarities; III. Theater, Ballet, Dance.

Unknown sketch on the back of a typed document about an agreement between the Reich Association of German Musicians and Music Teachers and Heads of the Folk Music Schools.

Envelope containing the letter in Box A, Folder 12, Item 2 in this collection. Postmarked February 4, 1935 in Leipzig.

A list of Oppel's work's in his handwriting beginning with music for piano.

Letter to Oppel from Felix Salzer dated February 3, 1935.

List of Oppel's works in his handwriting.

Typed statement regarding Emilie Mayer.

List of Oppel's works in his handwriting.

Envelope containing Oppel's doctoral diploma.

Letter from Carl Loewe to Emilie Mayer. Content of letter on p. 1. Address and postmark on p. 2.

Handwritten list of Oppel's works.

A list of fourteen performances of Oppel's works.

List of Oppel's works handwritten on one side of an envelope. Cancelled postmark on reverse.

"Letter from F. Salzer telling Reinhard Oppel about the death of Heinrich Schenker on 14 February 1935 in Vienna Sanatorium - found in Salzer Books about polyphony."

First page of a mirror canon for four voices and brief sketches in Oppel's handwriting. The third word in the title is difficult to discern but the first word, "Spiegel," translates to "mirror."

Typewritten list of Oppel's works: one list for vocal ensemble music; another, for piano music.

Preface on title page lists this volume as part of "Courses in Dr. Hoch's Conservatory in Frankfurt a[m] M[ain]." Title reads, "The fugues of the 'Well-Tempered Keyboard' of Joh[ann] Seb[astian] Bach in pictoral representation published as an appendix and addition to his textbook on the composition of the fugues by Iwan Knorr." Inside text is given in German, English, and French. Published in Leipzig in 1912 by Brietkopf & Härtel.