Sowell's Detachment, Tennessee Infantry
"From the 48th (Voorhies') Tennessee Infantry Regiment - The men who escaped capture at Fort Donelson were grouped into a detachment under Captain David R. Sowell, senior captain of the 48th, and ordered to Corinth, Mississippi. Here, on April 7, 1862, they were reorganized into a small battalion of four companies which, a few days later was consolidated with six companies from the 54th Tennessee Infantry Regiment plus some from other regiments who had also escaped capture at Donelson, to form the 48th (Nixon's) Tennessee Infantry Regiment." 
The book "Units of the Confederate States Army" by Joseph H. Crute, Jr. contains no history for this unit. 
- Beginning United States Civil War Research gives steps for finding information about a Civil War soldier or sailor. It covers the major records that should be used. Additional records are described in 'Tennessee 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.
- Tennessee in the Civil War describes many Confederate and Union sources, specifically for Tennessee, 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.
- Tennesseans in the Civil War, 48th (Voorhies') Tennessee Infantry Regiment, (accessed 31 Dec 2011).
- fold3$, Capt Park's Co (Local Defense Troops) AND Capt Sowell's Detachment, Infantry AND Capt Spencer's Co, Infantry AND Sullivan County Reserves (Local Defense Troops) AND Capt Tackitt's Co, Infantry, (accessed 26 Apr 2012). Unit information and rosters.