Please note - there are always 2 sets of parts for the Horn music:
one for French Horns in F, and one for Tenor Horns (Alt Horn) in E flat.
Beethoven Sonatina - 1st Movement
This 2 movement Sonatina was originally written for Piano,
and here is arranged for 2 Trumpets, 2 Horns and Euphonium.
If your available lower instruments are different,
it is easy to transpose new parts to suit what you have.
For example, Trombones could replace the Horn parts.
Pieces from Album for the Young Op.68
All these pieces are for 2 Trumpets, Horn and Euphonium