Jemima Knighton
Although she is shown with the surname of Shaw on the overland company records, the ship passenger list for The General McClellan shows her listed with Edward and Catherine Shaw as Jemima Nicholson, a 28 year old spinster. Jemima was Catherine's daughter from her first marriage to George Knighton.
1861 England and Wales census shows Jemima Nicholson and her husband Samuel Nicholson living in the household of Edward and Catherine Shaw.