This subseries comprises William Klenz's choral musical compositions, featuring works in English, French, and Latin languages. The majority of these compositions are religious choral music.

Choral sheet music not by Klenz, but collected by him can be found under the collected music ephemera series, located at the end of the collection.

This sub-series comprises hand-copied sheet music collected by William Klenz. These pieces were likely gathered and hand-copied by Klenz for research and performance purposes. The sub-series is a compilation of these hand-copied works, with file descriptions providing details about the song's writer and title.

This sub-series comprises hand-copied sheet music collected by William Klenz. These pieces were likely gathered and hand-copied by Klenz for research and performance purposes. The sub-series is a compilation of these hand-copied works, with file descriptions providing details about the song's writer and title.

This sub-series comprises hand-copied sheet music collected by William Klenz. These pieces were likely gathered and hand-copied by Klenz for research and performance purposes. The sub-series is a compilation of these hand-copied works, with file descriptions providing details about the song's writer and title.

This subseries offers a collection of William Klenz's cello musical compositions, with a major emphasis on the Sonata as a central piece, expertly utilized in numerous cello compositions. Notably, Klenz demonstrates his musical versatility by extending the use of the Sonata form to solo instruments such as Piano and Violin within this subseries.

This sub-series contains files showcasing William Klenz's musical compositions featuring the Piano. Additionally, files reflect Klenz's involvement in arranging certain compositions.

This sub-series comprises hand-copied sheet music collected by William Klenz. These pieces were likely gathered and hand-copied by Klenz for research and performance purposes. The sub-series is a compilation of these hand-copied works, with file descriptions providing details about the song's writer and title.

This sub-series contains files showcasing William Klenz's musical compositions featuring the Piano. Additionally, files reflect Klenz's involvement in arranging certain compositions.

This sub-series comprises hand-copied sheet music collected by William Klenz. These pieces were likely gathered and hand-copied by Klenz for research and performance purposes. The sub-series is a compilation of these hand-copied works, with file descriptions providing details about the song's writer and title.

This sub-series comprises hand-copied sheet music collected by William Klenz. These pieces were likely gathered and hand-copied by Klenz for research and performance purposes. The sub-series is a compilation of these hand-copied works, with file descriptions providing details about the song's writer and title.