One of Bertran's last works was written between the Seventh and Eighth Crusades (1260–1265) and bewails the decline of Christendom in Outremer. Bertran's most famous work is probably "Us cavaliers si jazia" ("Once a gentleman was lying"), which has been translated into English. Among the other troubadours with whom Bertran composed "tensos" were Guigon de Cabanas ( and ) and Sordello ( and ). Against Sordello, Bertran believed that the heart should be given only to the noblest ladies and not divided amongst cowards. Nonetheless, he was following Sordello when he composed a hybrid of a and a .