https://books.google.com/books?id=l84UAAAAYAAJ&pg=PA793&lpg=PA793&dq=william+and+experience+mackintosh+in+dedham+ma&source=bl&ots=8eIe3_GKAc&sig=ACfU3U1pw7ME47i3AGjWqa0FKOTD8t1fsA&hl=en&sa=X&ved=2ahUKEwjSzbSHkfXnAhVTvZ4KHeIpAgYQ6AEwAnoECAoQAQ#v=onepage&q&f=false