St. Gregorys Church Postcards St. Gregorys Church No. 272 Postcard. Caption on front: St. Gregory’s Church and Rectory. Dorchester Lower Mills, Mass. 2298- Published by G.W. Gragg. Postmarked Jul 12, 1906. On verso: N.E. Paper & Stationery Co., MFRS. Ayer, Mass. Facebook Twitter Print Friendly Skills Dorchester, Lower Mills, St. Gregory's Church Posted on November 14, 2022 ← St. Gregorys Church. Erected 1863. St. Leo’s Church →