The Italian admiral was meanwhile wasting time in lengthy correspondence with his Government, and sending it letters which revealed his irresolution and incompetence so plainly that they ought to have led to his immediate supersession. He complained he had not definite orders, though he had been directed to destroy the Austrian fleet, if it put to sea, or blockade it, if it remained in harbour. He explained now that he was mounting better guns in some of his ships, now that he was waiting for the "Affondatore" to join. Once he actually wrote saying that some new ironclads ought to be purchased from other powers to reinforce him. At last he was plainly told that if he did not at once do something for the honour of the Italian navy he would be relieved of his command. With the Austrians victorious in Northern Italy, a raid on Venice would have been too serious an operation, but he proposed as an alternative that a small land force should be embarked for a descent on the fortified island of Lissa, on the Dalmatian coast. His fleet would escort it, and co-operate by bombarding the island batteries. The plan was accepted, and he proceeded to execute it. It was about as bad a scheme as could be imagined. It is a recognized principle of war that over-sea expeditions should only be undertaken when the enemy's fleet has been either rendered helpless by a crushing defeat or blockaded in its ports. Before sending the transports to Lissa Persano should have steamed across to Pola and blockaded Tegethoff, fighting him if he came out. But Persano had a delusive hope that he could perhaps score a victory without encountering the Austrian fleet by swooping down on Lissa, crushing the batteries with a heavy bombardment, landing the troops, hoisting the Italian flag, and getting back to his safe anchorage at Ancona before Tegethoff could receive news of what was happening, and come out and force on a battle. Lissa was defended by a garrison of 1800 men, under Colonel Urs de Margina. This small body of troops held a number of forts and batteries mounting eighty-eight guns, none of them of large calibre. The works were old, and had been hurriedly repaired. Most of them dated from the time of the English occupation of the island during the Napoleonic wars.[22] Persano expected that Lissa would be a very easy nut to crack. [22] Some of the forts were still known by English names, such as Wellington Tower, Bentinck Tower, and Robertson Tower. On 16 July the Italian fleet sailed from Ancona. Even now Persano carried out his operations with leisurely deliberation. On the 17th he reconnoitred Lissa, approaching in his flagship under French colours. Early on the 18th the fleet closed in upon the island, flying French colours, till it was in position before the batteries.