Waltham, Vermont Built on the land of one of Addison County’s oldest settlements (the Barton Homestead and sheep farm, c. 1700s), this 1860s horse barn is all that is left of a larger farm compound that once included a large bank barn, farmhouse and various outbuildings, all of which burned in the 1920s. In the 1970s, the Kayhart family purchased the land and barn for their dairy operation and …