Ernest Grosjean (1844 - 1936) published "Pièces pour orgue ou harmonium", a set of 56 pieces in two volumes, in 1902. The first volume contains 33 easy pieces, that can be played without the use of pedals. The fifth piece is a sortie. Not a fastpaced boisterous one, it feels somewhat more solemn. Perhaps like a reminder to carry home the message heard during service. Or it's just the style of Grosjean.
In the comments under this (
http://www.contrebombarde.com/concerthall/music/29875) upload Adri and Fazioli had some suggestions for how one could play pieces originally written for harmonium more harmonium-like on the Stahlhuth/Jahn organ in Dudelange. To experiment with the different sound idioms I tried this piece in a more harmonium-like approach and a more organ -like approach.
This is the more harmonium-like approach. Registration intended to sound more like a harmonium and based on the suggestions by Fazioli. I like the play woth sub- and supercouplers, that's new to me. As I have no real live experience with an harmonium, it's difiicult to judge whether it really sounds like a harmonium.
The other upload is the more organ-like approach. I like that one best, so that'll be the guideline for the rest of the Grosjean pieces. But I'll keep Adr'i's advice in mind: "The change in timbres is never too drastic; it's about volume, dynamics, terrace type dynamics even from the same keyboard."
Score available here:
http://partitura.org/index.php/ernest-grosjean-sortie/