The second part comprises the remaining 6811 lines of the poem, in "laisses" 131 to 214. The author's identity is not certain, although the name of Gui de Cavalhon has been recently proposed. This second part covers events from 1213 onwards and takes the opposite point of view, critical of the Crusaders and strongly in favour of the southerners (though not of Catharism). To historians the "Song" is important for this whole period because it is the only major narrative source that takes the southern viewpoint; it is especially important from April 1216 to June 1219, because the prose narrative by Pierre des Vaux-de-Cernay becomes more sketchy and incomplete from 1216 onwards.