From "Debrett's Kings and Queens of Britain" by David Williamson, ISBN 0-86350-101-X, p. 21:
After his wife died, Ethelwulf, King of England, resigned his kingdom to his son Ethelbald and went on a pilgrimage to Rome, taking with him his youngest son Alfred, a boy of some 8 years. Ethelwulf and Alfred stayed in Rome for a year and on the return journey stopped at the court of Charles the Bald, King of the Franks and Charlemagne's grandson. Charles had a daughter Judith, who could not have ben more than 12 or 13 at the time, and he gave her in marriage to Ethelwulf, the wedding being solemnized at Verberie-sur-Oise on 1 Oct 856. Ethelwulf returned home in good health but died over a year later on 13 Jan 858.
From "Debrett's Kings and Queens of Britain" by David Williamson, ISBN 0-86350-101-X, p. 21-22:
Ethelbald took over the Kingdom of Wessex on his father's resignation in 855, but only gained full control on his father's death in 858. The only thing recorded of him is that he married his stepmother Judith, but was forced to put her away by the Church which frowned upon such 'incestuous' marriages. He died in the summer of 860 and was buried at Sherborne Abbey. Judith returned to her father's court in France and later married Baldwin II, Count of Flanders, becoming an ancestor of William the Conqueror's queen, Matilda.
From "Debrett's Kings and Queens of Britain" by David Williamson, ISBN 0-86350-101-X, p. 27:
No other Saxon queen had been anointed and crowned until Elfrida, wife of Edgar 'the Peaceful' King of England, on 11 May 973, with the exception of King Ethelwulf's second wife, Judith, who had been consecrated queen immediately after her marriage in France in 856.
Eldest daughter of Charles the Bald inherited both the name and the willful temperament of her grandmother. At first married for political reasons to Ethelwulf of Wessex (d. 858), and then to his short-lived successor Ethelbald (d. 860), Judith finally returned to Francia, where she lived at Senlis 'with all honor due to a queen.' Yet in 862 she eloped with Count Baldwin of Flanders, and soon married him, to the immense distress of her parents.
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