Kathryn I have very little information on the second marriage of James Cathcart. But the little I have you are very welcome to. I did not realize that Elizabeth brought 3 children with her to the marriage.Richardson Cathcart had the following siblings . Hester b 03-5-1848.Robert b 13-2-1851.Lyttle 23-4-1853. Mary b 18-7-1856.Sarah b 9-4-1858. Hester,Lyttle and Robert have I think been named after the names of their half sisters and brothers spouses.I would be very interested in Elizabeth Lawrences maiden name as both Lawrence and Brown are and were a very common names in the local townlands. With them being neighbours of where the Cathcarts lived.If possible I could ask both families if they have any information .