You are doing a wonderful job -- and doing it the way it ought to be done.I feel my part is chiefly as a kibbitzer.I have a couple of contributions to make, however.
A lady named Mary K. Ward posted two messages on an Ancestry Message Board (I think for Washington Co, ME) 18 Jun 2002, concerning Amos and Eben Ward.She quotes from two sources.
The first, a book "The History of Eau Claire County, 1914, Past & Present", page 893 is a brief biography of Amos Ward.It confirms he was born 20 Sep 1830 in Canada.He seesm to have spent nine years in PA, including two years in the 148 Regt PA Volunteer Infantry. He came to Eau Claire in August 1866. It is indeed he who m. Lydia M. Trott.Six children are given: "Charles R., who is a practicing physician in the city of Eau Claire and resides at home; Syntha; Eva J.; Louis, sho is also a physician and resides at Bemidji, Minn.; ; Allen and Kate.His daughter Sntha marreid A.E. henderson, a physician, and also resides at Bemidji, Minn."
The second, a book, "A History of Northern Wisconsin," Western Historical Co., A.T. Andreas, Prop., Chicago, IL, 1881, page 336 gives a brief biography of Eben Ward.He was born 13 Oct 1836 in Pembroke, ME and came to Wisconsin in the Spring of 1864, moving around several times as a sawyer and mill worker.He was in Eau Claire again at the time the book was published.He m. 2 Sep 1870 Sarah Brunk (as you noted, only this says Brunk not Brunks).Four children are given: Mabel J., Eugene G., Rutherford B., and Homer E.
As far as Lydia Trott's middle initial -- neither an initial or name is given in the Perry, ME Vital Records, so I can't help you there.
I couldn't nail down the New Brunswick Ward origins -- there were quite a few Wards up there, but it does sound (from your data) as though there was both an Amos and an Eben Ward in the previous generation.
On a more personal note, Laura Rebecca Trott Frye was actually a friend of my grandmother!According to my father, she used to visit them frequently on holidays.However my father's family lived in Andover, Mass, so I was surprised she died in Wisconsin.(I am correct in assuming Forest Hills Cem is in Chip. Co, WI, am I not?)