Guilmant was an accomplished and extremely prolific composer. Unlike Widor, who produced a great deal of music in all the main genres, Guilmant devoted himself almost entirely to works for his own instrument, the organ. His organ output includes: 'Pièces dans différents styles', published in 18 books; 'L'organiste pratique', published in 12 books; Eighteen 'Pièces Nouvelles'; and 'L'Organiste liturgique', published in 10 books. Guilmant's Eight Sonatas were conceived with the Cavaillé-Coll organ of La Trinité in mind, and are therefore symphonic in style and form, taking their place alongside the symphonic organ works of César Franck and the Organ Symphonies of Charles Marie Widor
Most of his pieces (and all of the most frequently played ones) are fairly short, but his big symphonic works have had their occasional champions, and they turn up on CD every so often.
This Sonata was written in Meudon in february 1884.
If anybody has some more information on this individual piece, it would be most welcome. I searched in my own library and on the Internet, but could not come up with any.
I Allegro Assai