During the lead-up to, and duration of, the Civil War, Grace's mother Amelia (Peirce) Huston must have been living with her widowed father, Thomas Peirce, while her husband was involved in military operations. She and her three children were shown in her father's household on the 1860 census of Springfield Township, Muskingum Co., Ohio, which was enumerated on June 18, 1860:

[Major] Thomas L. Peirce, age 69, Farmer, born Ohio
Amelia Hoston [Huston], age 34, born [Zanesville, Muskingum Co.,] Ohio
Thomas L. Hoston [Huston], age 4, born Texas
Ann Lucy Hoston [Huston], age 2, born New York [the future Mrs. Zerah Torrey]
Grace D. Hoston [Huston], age 8/12 (eight months old), born [ca. Oct. 1859] in [prob. Springfield Twp., Muskingum Co.,] Ohio

My guess is that they'd been there a number of months, because Grace was born in Ohio. Possibly Daniel didn't want his pregnant wife anywhere near a war zone, so took her to her father's house in Muskingum County, Ohio (i.e. solidly in the North, where he knew she'd be safe), where Grace was born in October 1859 (June 1860 minus eight months is October 1859).

Amelia's mother (Grace's grandmother) Ann Lucy (Stanbery) Peirce had died three years previously, on April 3, 1857, in Zanesville.

Grace was also found on the 1880 census of Fort Stevens, Stevens County, Dakota Territory, with her parents and sister:

[Col.] Daniel Huston, age 56, born Maine (both parents born in Maine)
Amelia Huston, aged 58, born Ohio (both parents born in Ohio)
Anna Huston, aged 22, born New York (parents born Maine and Ohio)
Grace D. Huston, aged 20, born Ohio (parents born Maine and Ohio)

It was 20 years before there was another census (the 1890 census was lost in a fire). So we next find Grace on the 1900 census of Springfield, Hampden County, Massachusetts, living with her brother-in-law Zerah Torrey and sister Anna. This census had numerous errors. I almost didn't recognize the person in whose household she was living, as Ancestry's indexers had transcribed "Torrey, Zerah W" as "Zuak W. Tomy." (This is pretty normal for Ancestry's indexing. I've come to believe that Ancestry hires foreigners and pays them 50 cents an hour. This is why you can't find your ancestors.) But then I recognized Anna and her three boys, and knew I had the right family. And then from the 1855 birth date I guessed it was Zerah. He evidently made a wild guess about grace's age, as she was said to be born in 1865 (age 35), but she was on the 1860 census already 8 months old, so can't have been born in 1865.

I lost track of her in 1910 and 1920. There was a Grace Huston on those censuses, living in boarding houses (the last one in Oregon). But that Grace was, on the 1910 census in Colorado, divorced with three daughters born *before* 1900 (at which time she was 40 and single); and, on the 1920 census, in Oregon, widowed with a child and grandchild; and on both of these supposedly born in Maine. But there were not other Grace Hustons that even came close. Very odd. Wrong person, I thought. So I wasn't able to find out where she died.

But then, I found an obit in the [Washington, D.C.] "Evening Star" of Wednesday, Sep. 7, 1927, saying that Grace Huston, daughter of the late Col. Daniel Huston, had died suddenly in "Stanford, Connecticut." The only thing is, the city in Connecticut is Stamford, with an M, whereas Stanford is in California. They said she died in Connecticut, though, so I'm just going to correct Stanford to Stamford, assuming that many people make this mistake...