Arthur Vanden Plas
As David (Agnus Dei) said on his upload of Entree Pontificale a couple of years ago "I can't tell you anything about the composer."
All I know is he was from Belgium, and this piece was published in 1900 as part of his 'Messe de Noel'.
This piece calls for ff dynamics. It is a rather short piece. Not sure if it is playing the melody of any carol or not - I don't recognise anything. I played another piece from this work the other day 'Elevation sur Adeste Fideles' which can be found here
https://www.contrebombarde.com/concerthall/music/49326
The score can be found on IMSLP:
https://imslp.org/wiki/Special:ReverseLookup/552380
Hope you enjoy.
John