In 1860, Griffin & Mahala Lewis, ages 47 & 45, are living at Mendon, Worcester Co., MA.
In 1870, Griffin & Mahala are ages 66 & 55, living at Smithfield, RI.
In 1880, Griffin & Mahala Lewis are living at Woonsocket, RI. He is 75 and she is 65. They are next door to niece Harriet S. Himes and her family. Also in town is Mahala's sister, Martha Aldrich, and their sister Ann Follet and her son's family.
From the RI Cemetery Database online:
LEWIS, GRIFFIN 1804c - 21 AUG 1890 CY030 (Pine Grove Cemetery, south of Washington St. near Knotty Oak)