26th Company Unattached, Massachusetts Infantry
The 26th Company Unattached, Massachusetts Infantry was organized at New Bedford and mustered in for one year's service December 13, 1864.
They had duty at Camp Meigs, Readville, and mustered out May 12, 1865. 
Companies in this Regiment with the Counties of Origin
Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first.
For more information see the following.
Wikipedia Article, Unattached Companies Massachusetts, (accessed 22 April 2013).
- Civil War Soldiers and Sailors System, (accessed 9 Dec. 2010) can be searched by soldier's name or by regiment; includes regimental rosters and additional history of the regiment.
- Beginning United States Civil War Research gives steps for finding information about a Civil War soldier. It covers the major records that should be used. Additional records are described in ‘Massachusetts in the Civil War’ and ‘United States Civil War, 1861 to 1865’ (see below).
- National Park Service, The Civil War Soldiers and Sailors System, is searchable by soldier's name and state. It contains basic facts about soldiers on both sides of the Civil War, a list of regiments, descriptions of significant battles, sources of the information, and suggestions for where to find additional information.
- Massachusetts in the Civil War describes many Confederate and Union sources, specifically for Massachusetts, and how to find them.. These include compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.
- United States Civil War, 1861 to 1865 describes and explains United States and Confederate States records, rather than state records, and how to find them. These include veterans’ censuses, compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.
- National Park Service, The Civil War Soldiers and Sailors System (accessed 4 January 2011).