Hello Tom,
last week I ordered in Munich's State Library out of the magazine that book "Hugo Schneider / Schweizer Waffenschmiede" for looking up that Swiss gunsmith "Giriens" from Aubonne.
There were two entries about "Giriens", I took a copy there and scanned it at home for you. Please refer to linked pic.
http://www.feuerbixler.de/varia/gunsmith-GiriensAubonne.htmlI'll gonna translate it for you:
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Giriens, gunsmith, Aubonne Waadt
mentioned 1832
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Giriens François, gunsmith, Aubonne Waadt
mentioned 1794-1799, probably identical with Giriens
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That's the only entry there in a thick book with thousands of gunsmiths, gunmakers, companies, factories, cutlers, crossbow makers, and a lot of other stuff. Some entries there are shown with brands and marks, but not that Mr. Giriens.
Maybe I can get some further information for you from another book, which a shooter friend owns.
Greetings from Munich/Bavaria
Biggi.