Do you have possession of the envelope the letter came in. If so, it contains a postmark indicating the town and state the letter was mailed from. On my other computer I have a census file that contains a Faitha living in Georgia.I think I have two in Georgia. Would have to view it first. It would be in the 1850's and she being born prior. If this of help, let me know. Please understand that while not common, Faith is not an unusual name.