Mattapan Falls Postcards Mattapan Falls No. 1001 Postcard. Caption on front: The Spring Flood, Mattapan Falls. Postally unused. On verso: The Royal Blue Card. Pub. by Putnam Art Co., Grove Hall, Boston. Facebook Twitter Print Friendly Skills Dorchester, Mattapan Falls Posted on November 27, 2022 ← All Saints, Ashmont Neponset River →