Hi! I have attached a copy of Ann and James marriage announcement. They were married on the 25th of July. This particular James and Ann have only one son that I currently know about. His name is Alexander Dallas Hall. Ann's father is Charles Hamilton, 13th of Fairholm. You can find him easily online. Ann's husband James was born Aug. 25, 1798. This was her second marriage. Firstly she married Col. Peter Maxwell who died in 1820.
Do you have a copy of the document showing James and Ann having more than one son?