It wouldn't be too much of an exaggeration to say that people think of stone houses when they think of Bucks County—although there are numerous examples in Hunterdon County NJ as well. Since major roads from Philadelphia to New York passed through this region, there was a considerable population that settled here. They used building materials most readily at hand, the commonest—and probably the most attractive—being the soft grey limestone. Sometimes this stone is a solid grey, occasionally almost blue, and often there are traces of yellow—ranging from the palest fawn to coppery orange. Often several of these colors appear in the stone of one house; almost always it is a stone glowin…