Fantasy Sonata, Op. 40 for Trombone and Piano by Benjamin Schroen is a work composed in 1900 which was forgotten and now rediscovered by musicologist and conductor, Dr. Keith Davies Jones.

Fantasy Sonata is written in the same virtuoso style as compositions of that period by Joseph Serafin Alschausky, and though quite challenging, it is fully idiomatic for the trombone. There is a passing ‘reference’ to the Concerto by Rimsky-Korsakov, and it is just possible that Schroen might have been familiar with that work as a trombonist himself. There are also some stylistic similarities to the Fantasia for trombone and organ Op.58 composed in the mid-19th century by Friedrich August Belcke (1795 – 1874).

The 6.5-minute work featuring several short cadenzas, contrasting dramatic and expressive sections is in Romantic style, in bass and tenor clef and appropriate for intermediate to advanced performers.