A piece most reenactors are very familiar with from the American Civil War Museum collection and countless reproductions--it is rarely made correctly and has never been used in a recreation of the unit it is ID'd to.  The "Moses Alexander" haversack was likely issued to Alexander, a member of the Barbour Artillery, while in Dalton in early 1864.  Made of heavy osnaburg with a lead button, entirely hand sewn, and patterned to utilize the full width of the cloth with little wastage, the bag is likely an example of a typical mass-produced government-issue piece.