with the subject matter of the remainder except that they are also associated with southern Scotland or northern England rather than Wales. One of these is a stanza which celebrates the victory of the Britons of the Kingdom of Strathclyde under Eugein I, here described as "the grandson of Neithon", over Domnall Brecc ("Dyfnwal Frych" in Welsh), king of Dál Riata, at the Battle of Strathcarron in 642: Another stanza appears to be part of the separate cycle of poems associated with Llywarch Hen. The third interpolation is a poem entitled "Dinogad's Smock", a cradle-song addressed to a baby named Dinogad, describing how his father goes hunting and fishing. The interpolations are thought to have been added to the poem after it had been written down, these stanzas first being written down where there was a space in the manuscript, then being incorporated in the poem by a later copier who failed to realise that they did not belong. The Strathcarron stanza, for example, is the first stanza in the B text of the Book of Aneirin, and Kenneth H. Jackson has suggested that it had probably been inserted on a blank space at the top of the first page of the original manuscript. According to John T. Koch's reconstruction, this stanza was deliberately added to the text in Strathclyde. Analysis and interpretation Date The date of Y Gododdin has been the subject of debate among scholars since the early 19th century. If the poem was composed soon after the battle, it must predate 638, when the fall of Din Eidyn was recorded in the reign of Oswy king of Bernicia, an event which is thought to have meant the collapse of the kingdom of the Gododdin. If it is a later composition, the latest date which could be ascribed to it is determined by the orthography of the second part of Scribe B's text. This is usually considered to be that of the 9th or 10th centuries, although some scholars consider that it could be from the 11th century. Most of the debate about the date of the poem has employed linguistic arguments, mostly concerning rhyme (since more is known about early Welsh phonology than other aspects of the language, like syntax). It is believed that around the time of the battle, the British language was transitioning into its daughter languages: the primitive form of Welsh in Wales, of