Sources used by Historical Data Systems, Inc.:
- Index to Compiled Confederate Military Service Records
- Various Cemetery listings on the internet
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John M. Lay enlisted as a Captain in Company I, 47th Arkansas Mounted Infantryl, age listed as 23, year unknown
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See: http://www.couchgenweb.com/civilwar/47thf&s.html
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You may procure his service records files at: http://history-sites.com/research/index.html