place he landed and captured some brass cannon; then returning to Callao he found that Blanco Encalada had gone south in search of provisions, and seeing nothing more was to be done at present, he followed him.
Cochrane had brought with him from England a mechanic who had worked with Congreve at the Arsenal at Woolwich. He now set him at work to make rockets, and made trial of them in the bay of Valparaiso, expressing himself as perfectly satisfied with them. Government also furnished him with a nine inch mortar which had been sent from Buenos Ayres, and a 28-gun frigate, purchased in the United States and named the Independencia, was added to the squadron. A brigade of 400 marines was also organized under the command of an English officer of experience named Charles, with Major Miller as his second.
The Pueyrredon, the Intrepido, and the Montezuma, were sent southward on a cruise in search of some Spanish ships which were reported to be on the way from Europe, and, on the 12th September, Cochrane and Blanco Encalada again sailed from Valparaiso with six ships of war, and two of the transports which had been captured by Blanco Encalada on his first cruise, and which were intended for fire-ships.
Cochrane had such faith in the terrible power of his new rockets that he was confident of success, and wrote to O'Higgins that at eight o'clock on the night of the 24th, the Spanish squadron at Callao would be in flames.
On the 28th September he anchored off the island of San Lorenzo, and on the 30th sent a challenge on shore to the enemy to come out and fight ship to ship. The Spaniards, who had in the meantime greatly strengthened their defences, by surrounding their ships with a boom, and had prepared furnaces to heat shot, returned a laconic refusal.
This time the attack was to be made by four pontoon batteries, one carrying the mortar, two carrying rocket-
