River Conwy and encamped at Deganwy, while another force had captured Anglesey and took possession of the harvest there. This deprived Llywelyn and his men of food, forcing them to seek terms. Treaty of Aberconwy What resulted was the Treaty of Aberconwy, which guaranteed peace in Gwynedd in return for several difficult concessions from Llywelyn, including confining his authority to Gwynedd Uwch Conwy once again. Part of Gwynedd Is Conwy was given to Dafydd ap Gruffydd, with a promise that if Llywelyn died without an heir, he would be given a share of Gwynedd Uwch Conwy instead. Llywelyn was forced to acknowledge the English king as his sovereign; initially he had refused, but after the events of 1276, Llywelyn was stripped of all but a small portion of his lands. He went to meet Edward, and found Eleanor lodged with the royal family at Worcester; after Llywelyn agreed to Edward's demands, Edward gave them permission to be married at Worcester Cathedral. A stained glass window exists to this day depicting the wedding of the Prince of Wales and Lady Eleanor. By all accounts, the marriage was a genuine love match; Llywelyn is not known to have fathered any illegitimate children, which is extremely unusual for the Welsh royalty. (In medieval Wales, illegitimate children were as entitled to their father's property as legitimate children.) Last campaign and death By early 1282, many of the lesser princes who had supported Edward against Llywelyn in 1277 were becoming disillusioned with the exactions of the royal officers. On Palm Sunday that year, Dafydd ap Gruffydd attacked the English at Hawarden Castle and then laid siege to Rhuddlan. The revolt quickly spread to other parts of Wales, with Aberystwyth castle captured and burnt and rebellion in Ystrad Tywi in south Wales, also inspired by Dafydd according to the annals, where Carreg Cennen castle was captured. Llywelyn, according to a letter he sent to the Archbishop of Canterbury John Peckham, was not involved in the planning of the revolt. He felt obliged, however, to support his brother and a war began for which the Welsh were ill-prepared. Personal tragedy also struck him at this time when, on or about 19 June 1282, his wife, Eleanor de Montfort, died shortly after giving birth to their daughter, Gwenllian. Their previous daughter, Princess Catherine, had been married to Philip ap Ivor, Lord of Cardigan. Events followed a similar pattern