Some of the most beautiful work of this craftsman, and many others, are in this book “Liège Gunmakers through their Work. 1800 - 1950”.
For more detail see: LIEGE GUNMAKERS
Heuseux & Janson
Here is a beautiful percussion pistol made by "HEUSEUX
& JANSON, Fabricants d’armes à Herstal,
near Liège", probably active until 1831, since they made a pair of percussion
pistols (conserved at the Royal Army Museum in Brussels, now the War Heritage
Institute) offered by the people of Liège to Lieutenant-Colonel Cointin for his
contribution to the failure of the Orange conspiracy. I assume this is one of
the two pistols in question.
A member
of the team points out that they have already been mentioned on the site and in
volume 3 of the "Armuriers Liégeois through their realizations" page 150.
In
addition, another member found the following:
and
https://www.mjvsoudant.be/lot/120847/17411396-paire-de-pistolets-de-duels-desearch=&
from
which it can be seen that they were active well before 1831, since they are
flint weapons.
GP with HPH and PHL