Mattapan Square Postcards Mattapan Square No. 1009 Postcard. Caption on front: Mattapan Square. Postmarked May 19, 1902. On verso: No. 290. Pub. by Boston Post-Card Co., 12 Pearl St. Facebook Twitter Print Friendly Skills Dorchester, Mattapan Square, train depot Posted on November 27, 2022 ← Blake House Water Front, Neponset →