http://www.harmoniumnet.nl/vox21-03.html In this edition a large article about the John Holt 3 mp reed organ, 27 jeux, 41 registres, manufacture 1938. It was in the Saltaire Museum, sold to someone in London, and now sold to a restorer in le Pays Bas.
Also a scientific article on harmoniums aspirante avec le double expression.
Aussi une article longue about a Mustel found by a Roman Catholic priest in New York ( the article is in English) who was born and raised in the city of Léogâne, Haïti, where Frère Maurice Ballade of Léogâne Cathédrale replaced a Debain harmonium by a Mustel harmonium d'art.
This Mustel harmonium is in a "caisse pupitre ébonisée", that is why he named the article "Black man playing a Mustel"
http://www.harmoniumnet.nl/dumont-mustel.html And many, many other articles.