Firefighters from Williamstown, North Adams and Pownal, Vt., extinguished the blaze at the three-bedroom residence at 23 Hoxsey St. in about 30 to 45 minutes, Fire Chief Craig Pedercini said. The Clarksburg Volunteer Fire Department responded to provide coverage at the Williamstown station. No one was home at the time of the Wednesday afternoon fire. The three tenants, students at Williams College, left for break earlier in the week, according to the building s owner, Paul Rinehart, who was on scene to watch the cleanup. Pedercini credited workers from the Williams College Science Center project across the street with helping to get the fire under control.