Their marriage record is found in Warwick Marriages 1850 - 1882, Vol. 1. According to the entry, Peacy was 20 years old, and William was 42. It was his third marriage.
In the 1910 Federal Census, William, Emma, and Gertrude are living in North Kingstown, RI.
In the 1920 Federal Census, William & Emma and their family were living in East Greenwich, RI. William's mother, Peace H. Miller, is living with them. In 1930, William and his wife and children are still there, living on Frenchtown Rd.
William's mother is Peace Hambly (Remington) Miller, sister of my great-grandfather John Allen Remington who married Angeretta Williams Whitford.