The warlike operations of 1614 had been ended by the abortive peace of Xanten. The two rival pretenders to the duchies were to halve the territory, drawing lots for the first choice, all foreign troops were to be withdrawn, and a pledge was to be given that no fortress should be placed in the hands of any power. But Spain at the last moment had refused to sanction the treaty, and everything was remitted to what might be exactly described as a state of sixes and sevens. Subsequently it was hoped that the States' troops might be induced to withdraw simultaneously with the Catholic forces on an undertaking by Spinola that there should be no re-occupation of the disputed territory either by the Republic or by Spain. But Barneveld accurately pointed out that, although the Marquis was a splendid commander and, so long as he was at the head of the armies, a most powerful potentate, he might be superseded at any moment. Count Bucquoy, for example, might suddenly appear in his place and refuse to be bound by any military arrangement of his predecessor. Then the Archduke proposed to give a guarantee that in case of a mutual withdrawal there should be no return of the troops, no recapture of garrisons. But Barneveld, speaking for the States, liked not the security. The Archduke was but the puppet of Spain, and Spain had no part in the guarantee. She held the strings, and might cause him at any moment to play what pranks she chose. It would be the easiest thing in the world for despotic Spain, so the Advocate thought, to reappear suddenly in force again at a moment's notice after the States' troops had been withdrawn and partially disbanded, and it would be difficult for the many-headed and many-tongued republic to act with similar promptness. To withdraw without a guarantee from Spain to the Treaty of Xanten, which had once been signed, sealed, and all but ratified, would be to give up fifty points in the game. Nothing but disaster could ensue. The Advocate as leader in all these negotiations and correspondence was ever actuated by the favourite quotation of William the Silent from Demosthenes, that the safest citadel against an invader and a tyrant is distrust. And he always distrusted in these dealings, for he was sure the Spanish cabinet was trying to make fools of the States, and there were many ready to assist it in the task. Now that one of the pretenders, temporary master of half the duchies, the Prince of Neuburg, had espoused both Catholicism and the sister of the Archbishop of Cologne and the Duke of Bavaria, it would be more safe than ever for Spain to make a temporary withdrawal. Maximilian of Bavaria was beyond all question the ablest and most determined leader of the Catholic party in Germany, and the most straightforward and sincere. No man before or since his epoch had, like him, been destined to refuse, and more than once refuse, the Imperial crown.