Yes, I can confirm that we have the right Jane, who married Robert Warwick in 1868. Of George Scott's children, this only leaves Ann who gave birth to Georgina Nicholl in 1851, and Jane Wylie in 1853. As she is the only one left, she must be the daughter who died in Nebraska, as stated on the Canonbie memorial stone. However, how do I find out when she left or whether she married before she left.