'The first two lines [of the stanza] describe the arms of Bertrand du Guesclin, which were, a black double-headed eagle displayed on a silver shield, with a red band across the whole, from left to right [in heraldic language, a bend dexter, gules]--"the lymrod coloured as the glede" or live coal--as may be seen in Anselme's _Histoire Généalogique de France_, and a MS. _Généalogies de France_ in the British Museum. Next, if we turn to Mr. D. F. Jamison's excellent _Life and Times of Bertrand du Guesclin_, we not only find on its cover Bertrand's arms as above described, but also at vol. ii. pp. 92-4, an account of the plot and murder to which Chaucer alludes, and an identification of his traitorous or "Genylon" Oliver, with Sir Oliver de Mauny of Brittany (or Armorica), Bertrand's cousin [or, according to Froissart, cap. 245, his nephew]. 'After the battle of Monteil, on March 14, 1369, Pedro was besieged in the castle of Monteil near the borders of La Mancha, by his brother Enrique; who was helped by Du Guesclin and many French knights. Finding escape impossible, Pedro sent Men Rodriguez secretly to Du Guesclin with an offer of many towns and 200,000 gold doubloons if he would desert Enrique and reinstate Pedro. Du Guesclin refused the offer, and "the next day related to his friends and kinsmen in the camp, and _especially to his cousin, Sir Oliver de Mauny_, what had taken place." He asked them if he should tell Enrique; they all said yes: so he told the king. Thereupon Enrique promised Bertrand the same reward that Pedro had offered him, but asked him also to assure Men Rodriguez of Pedro's safety if he would come to his (Du Guesclin's) lodge. Relying on Bertrand's assurance, Pedro came to him on [240] March 23; Enrique entered the lodge directly afterwards, and after a struggle, stabbed Pedro, and seized his kingdom. 'We see then that Chaucer was justified in asserting that Du Guesclin and Sir Oliver Mauny "brew this cursednesse"; and his assertion has some historical importance; for as his patron and friend, John of Gaunt, married one of Pedro's daughters [named Constance] as his second wife [Michaelmas, 1371], Chaucer almost certainly had the account of Pedro's death from his daughter, or one of her attendants, and is thus a witness for the truth of the narrative of the Spanish chronicler Ayala, given above, against the French writers, Froissart, Cuvelier, &c., who make the Bégue de Villaines the man who inveigled Pedro. This connexion of Chaucer with John of Gaunt and his second wife must excuse the poet in our eyes for calling so bad a king as Pedro the Cruel "worthy" and "the glorie of Spayne, whom Fortune heeld so hy in magestee."