down in Middle Welsh orthography. Scribe B added material later, and apparently had access to an earlier manuscript since the material added by this scribe is in Old Welsh orthography. Scribe B wrote 35 stanzas, some of which are variants of stanzas also given by Scribe A, while others are not given by A. The last stanza is incomplete and three folios are missing from the end of the manuscript, so some material may have been lost. Differences exist within the material added by Scribe B. The first 23 stanzas of the B material show signs of partial modernisation of the orthography, while the remainder shows much more retention of Old Welsh features. Jarman explains this by suggesting that Scribe B started by partially modernising the orthography as he copied the stanzas, but after a while tired of this and copied the remaining stanzas as they were in the older manuscript. Isaac suggested that Scribe B was using two sources, called B1 and B2. If this is correct, the material in the Book of Aneirin is from three sources. Poem The stanzas that make up the poem are a series of elegies for warriors who fell in battle against vastly superior numbers. Some of the verses refer to the entire host, and others eulogize individual heroes. They tell how the ruler of the Gododdin, Mynyddog Mwynfawr, gathered warriors from several Brittonic kingdoms and provided them with a year's feasting and drinking mead in his halls at Din Eidyn, before launching a campaign in which almost all of them were killed fighting against overwhelming odds. The poetry is based on a fixed number of syllables, though some irregularity occurs, which may be due to modernisation of the language during oral transmission. It uses rhyme, both end-rhyme and internal, and some parts use alliteration. A number of stanzas may open with the same words, for example "Gwyr a aeth gatraeth gan wawr" ("Men went to Catraeth at dawn"). The collection appears to have been compiled from two different versions: according to some verses, there were 300 men of the Gododdin, and only one, Cynon ap Clydno, survived; others have 363 warriors and three survivors, in addition to the poet, who as a bard, almost certainly would not have been counted as one of the warriors. The names of about 80 warriors are given in the poem. The Book of Aneirin begins with