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Amos Moses also appears by his middle name - Moses, in the 1850 census. (In fact, in cases like this, it proves impossible to tell which was actually the first name and which was the second. A cousin is known to history as Converse Pain Greeno, but he was certainly originally Pain Converse Greeno, named after his maternal grandfather, Pain Converse.)
William was b. about 1831 (+/- a year or so) based on the 1850 census. I hadn't noticed this when I suggested it, but the alternative, that Wallace was an otherwise unknown younger son would place his birth after 1850, and make him not even 15 by the end of the war, which was tooyoung to be drafted (in the north). It is hard to say why people enlisted, but barring some strong abolitionist sentiment, I would expect a married person to be less likely than a single man, and if he already owned a farm, he may not have been easily spared, compared to a younger, unsettled sibling.
FWIW, I posted a second edition of my web page, with many additions.