I started walking north on the west side of Chain Bridge Rd. just past the corner of Chain Bridge Rd. & North St. (at the Moore House). I walked north for one block until Chain Bridge starts down the hill. These three houses (starting with the Donohoe House) are all on the west side of Chain Bridge Rd (route 123).
Looking south on Chain Bridge Rd:
Looking north on Chain Bridge Rd:
Looking south on Chain Bridge Rd:
Looking north on Chain Bridge Rd: