Kerstverhaal (Christmas Story)

Jos Mertens. Born 1 Oct.1924 in Ternat, Belgium.
Pianist, organist, self-taught on organ, harmony and composition, taking exams at the Belgian College of Music in Antwerp, received diplomas in piano at the academy in Asse, in harmony at the academy in Aalst, in organ at the academy in Halle, 2008-2013 organist of the Sint Egidiuskerk in Groot-Bijgaarden.

I cannot find more information so welcome more from anyone.

I think this translates as Christmas Story so consider this a piece for a mid-year Southern Hemisphere Winter Christmas.

Registration;
Man 3 Holpijp and Viola di Gamba (solo)
Man 2 Nachthoorn
Man 1 Violon ( for middle interlude)