Madisox, Wis., May 27. - Fire at Cambridge, this county, fSunday night destroyed thirteen buildings, being the principal part of the town. But little can be learned as to the origin of the firs or what buildings were destroyed as Cambridge is about three miles from London, tho nearest telegraph station. The loss is estimated at $40,000; insurance half that amount. The flre originated iu a barn. It is supposed to be the work ol an incendiary.