A.D. 852. About this time Abbot Ceolred of Medhamsted, with the concurrence of the monks, let to hand the land of Sempringham to Wulfred, with the provision, that after his demise the said land should revert to the monastery; that Wulfred should give the land of Sleaford to Meohamsted, and should send each year into the monastery sixty loads of wood, twelve loads of coal, six loads of peat, two tuns full of fine ale, two neats' carcases, six hundred loaves, and ten kilderkins of Welsh ale; one horse also each year, and thirty shillings, and one night's entertainment. This agreement was made in the presence of King Burhred. Archbishop Ceolnoth, Bishops Tunbert, Kenred, Aldhun, and Bertred; Abbots Witred and Weftherd, Aldermen Ethelherd and Hunbert, and many others. A.D. 853. This year Burhred, King of Mercia, with his council, besought King Ethelwulf to assist him to subdue North-Wales. He did so; and with an army marched over Mercia into North-Wales, and made all the inhabitants subject to him. The same year King Ethelwulf sent his son Alfred to Rome; and Leo, who was then pope, consecrated him king, and adopted him as his spiritual son. The same year also Elchere with the men of Kent, and Huda with the men of Surrey, fought in the Isle of Thanet with the heathen army, and soon obtained the victory; but there were many men slain and drowned on either hand, and both the aldermen killed. Burhred, the Mercian king, about this time received in marriage the daughter of Ethelwulf, king of the West-Saxons.