Mattapan Square Postcards Mattapan Square No. 537 Postcard. Caption on front: Mattapan Square, Mattapan, Mass. Postmarked Mattapan with one cent stamp. On verso: C 2196 Published by The New England News Company, Boston, Mass. Leipzig-Berlin-Dresden. Facebook Twitter Print Friendly Skills Dorchester, Mattapan, Mattapan Square Posted on November 25, 2022 ← Dorchester High School Mattapan Square with Trolleys →