Hollingsworth Mill, Neponset River Postcards Hollingsworth Mill, Neponset River No. 1011 Postcard. Caption on front: Old Hollingsworth Mill, Neponset River. Postally unused. On verso: Genuine Hand-colored. Pub. by Putnam Art Co., Grove Hall, Boston. Facebook Twitter Print Friendly Skills Dorchester, Mattapan, Neponset River Posted on November 28, 2022 ← Water Front, Neponset Frank Wood Convalescents Home →