The following soldiers may or may not be related to you. You will have to make your own conclusions by researching and well documenting your family.
The following information was taken from the compiled service record of each soldier and if you are interested in more information you must consult the compiled service records.
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John F. Foster, 42nd Regiment Mississippi Infantry, Company F
He enlisted at Sarepta, Calhoun County, Mississippi on April 29, 1862. He was married and his age was 33 years. His residence was Sarepta, Calhoun County, Mississippi. He died September 13, 1862 of disease in Richmond, Virginia. Eugenia Foster was his widow.
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Moses Foster, 42nd Regiment Mississippi Infantry, Company F
He enlisted at Sarepta, Calhoun County, Mississippi on April 29, 1862. He was married and his age was 21 years. He was 6 feet tall with black hair, blue eyes, light complexion. He was born in Tuscaloosa, Alabama. His residence was Pittsboro, Calhoun County, Mississippi. He was discharged from the service on Dec. 28, 1862 in Richmond, Virginia, because of illness. He received a "Certificate of Disability for Discharge".
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Thomas Foster, 4th Regiment Mississippi Infantry, Company F
His name is listed as Thomas Foster, Thomas P. Foster, and Thomas F. Foster. His residence was in Calhoun County, Mississippi.
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William Foster, 4th Regiment Mississippi Infantry, Company F
He enlisted at Pittsboro, Calhoun County, Mississippi on November 25, 1861. He was wounded at Fort Donelson on February 15, 1862 and was never heard from again. His wife was Mary Foster of Pittsboro, Calhoun County, Mississippi.
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Regarding land records for Calhoun County, Mississippi:
The courthouse in Calhoun County burned on December 22, 1922 and all records were destroyed with the exception of five books of land abstracts.
The five books of land abstracts begin in the year 1852 when the county was created and are housed in the office of the Chancery Clerk in Pittsboro with transcribed copies.
Calhoun County was created on March 8, 1852 from the counties of Lafayette, Yalobusha, and Chickasaw, therefore, if you are interested in land records prior to 1852, you will need to visit the courthouses of Lafayette, Yalobusha, and Chickasaw.
The above information was taken from the following webpage and I am assuming the information to be accurate, as I am not familiar with Calhoun County. The webpage may be very helpful to you. Here is the link:
http://www.mymississippigenealogy.com/ms-county-calhoun.html#eh
According to the Calhoun County Journal, the courthouse in Calhoun County is presently being renovated and the office of the Chancery Clerk has temporarily moved out of the courthouse and across the Pittsboro Square next door to Pittsboro Town Hall.
Also, the Mississippi Department of Archives and History in Jackson, Mississippi has county courthouse records on microfilm. Refer to the following links:
http://opac2.mdah.state.ms.us/county/county.php?
http://mdah.state.ms.us/arrec/gen_research.php#county
Also, the following article may be helpful to you:
http://genealogy.about.com/cs/court_records/a/courthouse.htm
Good luck in your search.
Regards---