On returning to the West, Philip did not wrest from King Richard those great and definitive conquests which were to restore to France the greater part of the marriage-portion that went with Eleanor of Aquitaine; but he paved the way for them by petty victories and petty acquisitions, and by making more and more certain his superiority over his rival.

When, after Richard's death, he had to do with John Lackland, cowardly and insolent, knavish and addle-pated, choleric, debauched, and indolent, an intriguing subordinate on the throne on which he made pretence to be the most despotic of kings, Philip had over him, even more than over his brother Richard, immense advantages.

He made such use of them that after six years' struggling, from 1199 to 1205, he deprived John of the greater part of his French possessions, Anjou, Normandy, Touraine, Maine, and Poitou.

Philip would have been quite willing to dispense with any legal procedure by way of sanction to his conquests, but John furnished him with an excellent pretext; for on the 3d of April, 1203, he assassinated with his own hand, in the tower of Rouen, his young nephew Arthur, Duke of Brittany, and in that capacity vassal of Philip Augustus, to whom he was coming to do homage.

Philip had John, also his vassal, cited before the court of the barons of France, his peers, to plead his defence of this odious act.
"King John," says the contemporary English historian Matthew Paris, "sent Eustace, Bishop of Ely, to tell King Philip that he would willingly go to his court to answer before his judges, and to show entire obedience in the matter, but that he must have a safe-conduct.