In September 2009 there was a long dialogue on the Message Board BBC I Pod no.183 from "Smuffy", about the relationship between her GG grandfather Charles Frederick Thomas d.1922 who's daughter a widow of an Austrian title,
Albina Mathilde Schneider nee Thomas married L D Byatt in 1946. I have her as Elizabeth Allan Schneider. I would be interested if anyone has seen other references by "Smuffy".