Watertown Police called in for smoke showing from the roof of a 2.5 story wood frame which housed a law office on Echo Lake Rd. On arrival the first due fire office called for a second alarm for a working structure fire. Multiple lines were stretched and one put in operation to knock down the fire in what appeared to be a room on the second floor in the rear of the building. The fire was quickly brought under control and crews opened windows to assist in the ventilation of the structure.