Seeking Parents of Eunice Sadler (1797-1830) Hampshire Co., Mass.

Can anyone identify the parents of Eunice Sadler of Williamsburg, Massachusetts, who married Chester W. Packard of Cummington, Mass., 4 July 1816? They had the following children, all born in Cummington:
Ira b. 28 Oct 1817, d. 25 Sep 1899 in Macy, Miami Co., Indiana;
Edwin Chester b. 26 Aug 1819, d. 18 Apr 1821;
Edwin Chester (again) b. 9 May 1822, d. aft 1871, place not reported;
Sumner b. 6 Apr 1824, d. aft 1883 in Dayton, Waupaca Co., Wisconsin;
Silas Sadler b. 28 Apr 1826, d. 27 Oct 1898 in New York, New York;
William Dwight b. 23 Aug 1828, d. 1916 in Frazeysburg, Muskingum Co, Ohio.

Ira m. 12 Mar 1840 at Newark, Licking Co, Ohio, Elizabeth Jane Bryant.
Elzabeth b. 15 Jun 1821 at Fredonia, Licking Co., Ohio; d. 10 Jun 1890 in Indiana. They had 11 children in Ohio and/or Indiana.

Edwin m. 12 Mar 1844 at Cummington, Caroline Bailey.
Caroline b. 7 Jan 1824 at Wilmington, Essex Co., New York; d. 15 Mar 1887 in Iowa. They had 7 children in Ohio and Iowa.

Sumner m. 14 Nov 1850 at Fredonia, Licking Co., Ohio, Elmira Jane Eaton.
Elmira b. May 1834 at Chesterfield, Cheshire Co., New Hampshire; d. 6 Mar 1856 at Dayton, Waupaca Co., Wisconsin. Sumner and Elmira had 2 children in Wisconsin. The children both died there in 1863.
Sumner m. again 3 May 1860 at Freedom, Portage Co., Ohio, Juliet Diadema Hamm. Juliet b. 25 Nov 1834 at Truxton, Cortland Co., New York; her death not reported. They had 2 children in Wisconsin.

Silas m. 6 Mar 1850 at Cincinnati, Hamilton Co., Ohio, Marion Helena Crocker.
Marion b. 23 Sep 1828 at New York, Queens Co., New York; d. 27 May 1879. Sumner and Marion had 1 child in Michigan and 1 in New York.
Silas m. again 24 Apr 1884, place not reported, Charlotte "Lottie" Hill.
Silas was founder of Packard's Business College in New York and co-author of books on bookkeeping and commercial arithmetic.

William m. 2 Nov 1848 at Burlington, Knox Co., Ohio, Catherine E. Stinemates.
Catherine b. Apr 1827, place not reported; d. 1908 at Frazeysburg, Muskingum Co., Ohio. They had 2 children, presumably in Ohio.

I thought the readers of this Sadler GenForum might be interested in these descendants of Eunice Sadler, particularly Silas Sadler Packard, and might be able to add some of the missing facts. I will be glad to identify my sources and to share details of the grandchildren and of the Packard ancestry.

Dick Packard, Littleton, Mass.