Edgar Tinel (1854-1912) was director of the Lemmens Institute from 1881 to 1909, which was still based in Mechelen at the time. In that period he wrote his best-known work: the oratorio Franciscus for soloists, choir and orchestra from 1888, which tells the life of St Francis in three parts. In the BOO collection, this manuscript with the prelude to the first part can be found. The prelude was also performed separately from the oratorio.
The unknown copyist had a very beautiful and regular handwriting: the score is very easy to read, which can certainly not be said of all manuscripts from BOO. As in many other scores, notes have been written in red and blue pencil.
You can browse the full score here.