The various allegations of Mrs. Serres as to her mother’s marriage were not treated seriously for a long time but they were so persisted in that it became necessary to have some denial in evidence. Accordingly a law-case was entered. One which became a _cause célèbre_. It began in 1866--just about a hundred years from the time of the alleged marriage. With such a long gap the difficulties of disproving Mrs. Serres’ allegations were much increased. But there was no help for it; reasons of State forbade the acceptance or even the doubt of such a claim. The really important point was that if by any chance the claimant should win, the Succession would be endangered. The presiding judge was the Lord Chief Justice, Lord Cockburn. With him sat Lord Chief Baron Pollock and the Judge Ordinary Sir James Wilde. There was a special jury. The case took the form of one in the English Probate Court made under the “Legitimacy Declaration Act.” In this case, Mrs. Ryves, daughter of Mrs. Serres, was the petitioner. Associated with her in the claim was her son, who, however, is of no interest in the matter and need not be considered. The petition stated that Mrs. Ryves was the legitimate daughter of one John Thomas Serres and Olive his wife, the said Olive being, whilst living, a natural-born subject and the legitimate daughter of Henry Frederick, Duke of Cumberland and Olive Wilmot, his wife. That the said Olive Wilmot, born in 1750, was lawfully married to His Royal Highness Henry Frederick, Duke of Cumberland, fourth son of Frederick Prince of Wales (thus being grandson of George II and brother of King George III), on 4 March 1767, at the house of Thomas, Lord Archer, in Grosvenor Square, London, the marriage being performed by the Rev. James Wilmot D. D., father of the said Olive Wilmot. That a child, Olive, was born to them on 3 April 1772, who in 1791 was married to John Thomas Serres. And so on in accordance with the (alleged) facts above given. The strange position was that even if the petitioner should win her main case she would prove her own illegitimacy. For granting that the alleged Olive Serres should have been legally married to the Duke of Cumberland, the Royal Marriage Act, passed five years later, forbade the union of the child of such a marriage, except with the sanction of the reigning monarch.