The Fenian Brotherhood was formed in the US in 1858, a partner organization to the Irish Republican Brotherhood. The groups were militant organizations looking to procure Irish independence from the British, and they found significant support among the Irish-American immigrant community. In November 1865 they purchased some 7500 1861 and 1863 pattern muskets left over from Civil War production, and used them to invade Canada in April 1866. The idea was to capture the country and then trade it to the British in exchange for Irish independence…but the invasion went quite badly. The Fenians briefly held Fort Erie, but we pushed out after a few hours and largely arrested by American forces.

The Fenians’ muskets were confiscated, but all returned by the end of 1866 in exchange for promised Irish-American support of embattled President Johnson. By 1868, the group was making plans for another attempt at conquering Canada. This time they would have better arms - the obtained a disused locomotive factory in Trenton NJ and set up the Pioneer Arms Works to convert 5,020 muskets into centerfire Needham Conversion breechloaders. These were given chambers that could fire standard .58 centerfire ammunition, or the .577 Snider ammunition that the Fenians expected to be able to procure once in Canada. Most of the guns also had their stocks cut, to allow them to be packed in shorter crates for transit. These usually have a distinctive “V” cut in the stock, which was spliced back together before use.

When the second invasion came in April 1870, it was again a failure. Only 800-1000 men turned out or the 5,000+ expected. They were scattered among several different muster points on the border, and the Canadians were once again aware of their plans. The most substantial fight was at a place called Eccles Hill, where the Missisiquoi Home Guard was ready and waiting for them with good Ballard rifles. Upon crossing the border, the Fenians were soundly defeated.

This second time, the guns were confiscated and not returned. Instead, the Watervliet Arsenal sold them as surplus in 1871. They were purchased by Schuyler, Hartley & Graham for commercial resale, and thanks to that several hundred remain in collector hands today.