Soon a new terror was added to those already menacing the Pinkertons. The dull roar of a cannon was heard proceeding from the heights across the river, and, at the first shot, a huge gap was torn in the roof of the outer barge. Another shot flew wide of the barges and struck Silas Wain, a young steelworker who was standing in an exposed part of the mill yard, killing him instantly. Wain's sweetheart, a young English girl named Mary Jones, to whom he was to have been married in a few weeks, almost lost her reason when the news of her lover's death reached her, and was delirious for hours. In consequence of this unfortunate occurrence, the cannon that did the mischief--a twenty-pounder--was subsequently shipped across to the Homestead side. Another piece of ordnance, of smaller calibre, was taken from the quarters of the Homestead Grand Army post and mounted at the pump-house of the county poor farm, adjoining the mill-yard. Owing to the elevation of the position, however, and the inexperience of the men who were handling the guns, it was found impossible to get the range of the barges and both pieces were ultimately abandoned. [Illustration: BEHIND THE BARRICADES.] As the morning advanced, the workmen began to realize that some more effective means than rifle bullets must be resorted to in order to dispose of the barges and their obnoxious freight. The Pinkertons took care not to expose themselves, unless when one more venturesome than the rest undertook to make a reconnoissance and emerged on the bow of either barge. As this exploit invariably attracted a hail of bullets it was not frequently attempted. About 50 of the guards, all of them old hands in the Pinkerton service, kept up a regular fire through the loopholes cut in the sides of the barges, rendering it unsafe for a workman to show himself outside the furnace-stacks and piles of metal used as ramparts. George Rutter, an old and respected Amalgamated man and a member of the Grand Army, forfeited his life by taking chances on the accuracy of the Pinkerton men's marksmanship. He was shot in the thigh and died from the wound a few days later. John Morris, another mill-worker, and Henry Striegel, a young man who was on the field merely as a sympathizer, met the same fate. Striegel accidentally shot himself with his own gun, and was struck by shots from the barges after he fell.