The first movement from Suite for Organ by Jehan Alain. This organ suits this work, the suggested registrations can be easily used on this instrument.
I am also using the Leduc Edition and am managing the suggested tempo by Marie-Claie Alain, however in the forward it states that "strict tempo is in order only in certain pieces of marblelike character". The Introduction & Variations are indicated "Doux & Fluide".
I am sure this is a first for CCH, I hope you enjoy it.