Undismayed by the failure of his first attempt, Pope Pius had immediately gone to work to reorganize his Holy League. He had to overcome the mutual hatred and mistrust that lay between Spain and Venice, aggravated by the recent conduct of Doria, but neither the Pope nor Venice could do without the help of Spain. There was much bickering between the envoys in the Papal chambers, and it was not till February, 1571, that the terms of the new enterprise were agreed upon. By this contract no one of the powers represented was to make a separate peace with the Porte. The costs were divided into six parts, of which Spain undertook three, Venice, two, and the Pope, one. Don Juan, the illegitimate brother of Philip II, was to be commander in chief. Although only twenty-four, this prince had won a military reputation in suppressing the Moorish rebellion in Spain, and, having been recognized by Philip as a half brother, he had a princely rank that would subordinate the claims of all the rival admirals. Finally, the rendezvous was appointed at Messina. The aged Venetian admiral, Veniero, had been compelled by the situation in the east to divide his force into two parts, one at Crete, and the other under himself at Corfu. By the time he received orders to proceed to the rendezvous, he learned that Ali, the corsair king of Algiers, known better by his nickname of "Uluch" Ali, was operating at the mouth of the Adriatic with a large force. To reach Messina with his divided fleet, Veniero ran the risk of being caught by Ali and destroyed in detail, but the situation was so critical that he took the risk and succeeded in slipping past the corsair undiscovered. In permitting this escape, and in fact in allowing all the other units of the Christian fleet to assemble at Messina, Ali missed a golden opportunity to destroy the whole force before it ever collected. Instead, he continued his ravages on the coasts of the Adriatic, bent only on plunder. He carried his raids almost to the lagoons of Venice itself, and indeed might have attacked the city had he not been hampered by a shortage of men.