The growth of republican theory kept pace with the progress of the revolt. Orange was surrounded by men holding the free principles of Duplessis-Mornay and corresponding with him. Dutchmen now openly voiced their belief that princes were made for the sake of their subjects and not subjects for the sake {265} of princes. Even though they denied the equal rights of the common people they asserted the sovereignty of the representative assembly. The Council of State, having assumed the authority of the viceroy during the interim, was deluged with letters petitioning them to shake off the Spanish yoke entirely. But, as the Council still remained loyal to Philip, on September 4 its members were arrested, a _coup d'etat_ planned in the interests of Orange and doubtless with his knowledge. It was, of course, tantamount to treason. The Estates General now seized sovereign powers. Still protesting their loyalty to the monarch's person and to the Catholic religion, they demanded virtual independence and the withdrawal of the Spanish troops. To enforce their demands they collected an army and took possession of several forts. But the Spanish veterans never once thought of giving way. Gathering at Antwerp where they were besieged by the soldiers of the States General, [Sidenote: November 4, 1576] they attacked and then scattered the bands sent against them and proceeded to sack Antwerp like a captured town. In one dreadful day 7000 of the patriots, in part soldiers, in part noncombatants, perished. The wealth of the city was looted. The army of occupation boasted as of a victory of this deed of blood, known to the Netherlanders as "the Spanish fury." Naturally, such a blow only welded the provinces more firmly together and steeled their temper to an even harder resistance. Its immediate result was a treaty, known as the Pacification of Ghent, between the provinces represented in the States General on the one hand and Holland and Zeeland on the other, for the purposes of union and of driving out the foreigner. The religious question was left undecided, save that the northern provinces agreed to do nothing for the present against the Roman church. But, as {266} heretofore, the Calvinists, now inscribing "Pro fide et patria" on their banners, were the more active and patriotic party. [Sidenote: Don John, 1547-78]