I went to Chapel Hill School in Waltham Massachusetts from 1959 to 1962, It is now Chapel Hill - Chauncey Hall. The old school building had "1860" over the entrance. There was a cottage nearby serving as a dorm. My housemother told me there was a tunnel between the two buildings that had served on the underground railroad - she had just seen the entrance but it was filled in - she was quite happy and excited. I went looking for it but could not find it, but wasn't sure what to look for. The school was founded by the Swedenborgian Church. There was also a chapel at Piety Corner.