At Wedmore, Alfred and Guthrum negotiated what some historians have called the Treaty of Wedmore, but it was to be some years after the cessation of hostilities that a formal treaty was signed. Under the terms of the so-called Treaty of Wedmore, the converted Guthrum was required to leave Wessex and return to East Anglia. Consequently, in 879 the Viking army left Chippenham and made its way to Cirencester. The formal Treaty of Alfred and Guthrum, preserved in Old English in Corpus Christi College, Cambridge (Manuscript 383), and in a Latin compilation known as "Quadripartitus", was negotiated later, perhaps in 879 or 880, when King Ceolwulf II of Mercia was deposed.