 Houston's Chestnut Hill mansion, Druim Moir (1886), still exists, having been converted to condominium use.Springside School occupies part of the former estate's grounds.Houston's 1895 will was still contested until 1964, by that time the property he left in trust was worth approximately $145 million, leading to a decision by the Pennsylvania Supreme Court The case is often taught in law school in property and probate law courses as it deals with the interpretation of future interests created in favor of Houston's grandchildren.