1851 Great Exhibition: Official Catalogue: Class VIII.: Thomas Boss
219. BOSS, THOMAS, 73 St. James's Street, Pall Mall — Manufacturer.
Central fire double-gun; sight shields in centre of the breast of hammers.
Other single and double guns.
Double gun in an unfinished state.
Specimen of the manufacture of a gun-barrel previous to its being welded together.
Barrels welded in a black forged state; barrels filed, put together, and "proved."
Locks in black forged state, and in bright filed state.
Gun furniture in black forged state, and in bright filed state in various forms.
Various articles useful in the equipment of firearms.