Neponset River Postcards Neponset River No. 1317 Postcard. Caption on front: View Neponset River, Mattapan, Mass. Postmarked Boston Mar 10, 1911. With one-cent stamp. On verso: A.M.S. 8146 Facebook Twitter Print Friendly Skills Dorchester, Mattapan, Neponset River Posted on December 1, 2022 ← All Saints Church interior Church of the Holy Spirit →