On April 21, 1900 about 6:30 in the evening, a dynamite charge was set off against the hinges of Lock No. 24 of the Third Welland Canal (just to the east of Lock No. 7 of today's canal ()), doing minor damage. This time, the saboteurs were caught in nearby Thorold. John Walsh, John Nolan and the ringleader "Dynamite" Luke Dillon (a member of Clan-na-Gael) were tried at the Welland Courthouse and found guilty, receiving life sentences at Kingston Penitentiary. The "star witness" at the trial was a 16-year-old Thorold girl named Euphemia Constable, who caught a good look at the bombers before being knocked unconscious by the blast. While waiting to testify, the girl received death threats, but, they turned out to be a hoax. As for the prisoners, Nolan lost his sanity while incarcerated, John Walsh was eventually released while Luke Dillon remained in custody until July 12, 1914.