In 1887, the distillery was visited by Alfred Barnard, a British writer, as research for his book, "the Whiskey Distilleries of the United Kingdom". By then, the much enlarged distillery was being managed by John's sons, John Edward and James Harvey, who told Barnard that the distillery's output had more than doubled during the preceding ten years, and that they intended to install electric lighting. Barnard noted that the distillery, which he referred to as the "Brusna Distillery", named for the nearby river, was said to be the oldest in Ireland. According to Barnard, the distillery covered 5 acres, and employed a staff of about 70 men, with the aged and sick pensioned-off or assisted. At the time of his visit, the distillery was producing 157,200 proof gallons per annum, though it had the capacity to produce 200,000. The whiskey, which was sold primarily in Dublin, England, and "the Colonies", was "old pot still", produced using four pot stills (two wash stills: 10,320 / 8,436 gallons; and two spirit stills: 6,170 / 6,080 gallons), which had been installed by Millar and Company, Dublin. Barnard remarked that at the time of his visit over 2,000 casks of spirit were ageing in the distillery's bonded warehouses.