Were the men of the 154th in general, older guys? I know that the term "senior" denotes the age of the regiment itself but wouldn't there be a good number of fellows born in the 1820s or so? I am trying to pin down the age of an ancestor (A.J. Cooper) who has not been found on any census. He was killed in spring of 1864 after serving only a few months in the 154th.