On July 20th news came of an unexpected success. It will be remembered that General Hull on his march to Detroit had left his heavy baggage and stores to be conveyed by a schooner, _Cayahoga_, from the Miami River to Detroit. The boats of the _Hunter_, under the command of Lieutenant Rolette, came across this schooner and succeeded in capturing it. General Brock wrote at once to Sir George Prevost to tell him that Colonel St. George had reported the capture and had sent him some interesting documents found on board. From the correspondence taken he judged the force at Detroit to consist of about two thousand men. It was reported also that the enemy were making numerous and extensive inroads from Sandwich up the river Thames. He had therefore sent Captain Chambers with about fifty of the 41st to the Moravian town, {219} where he had directed two hundred militia to join him. He was most anxious to set off himself for Amherstburg, but was obliged to wait for the meeting of the legislature, which was summoned for July 27th. As to making an attack on Fort Niagara, which had been suggested, General Brock did not think it was of immediate consequence. He writes: "It can be demolished when found necessary in half an hour." His guns were in position and he considered his front to be perfectly safe. In the meantime he was devoting himself to the training of the militia, to enable them to acquire some degree of discipline. [Sidenote: Brock's appeal] On July 22nd from Fort George, General Brock issued another proclamation as president of the province. It ran as follows: "The unprovoked declaration of war by the United States of America against the United Kingdom of Great Britain and Ireland has been followed by the actual invasion of this province, in a remote frontier of the western district, by a detachment of the armed forces of the United States. The officer commanding that detachment has thought proper to invite His Majesty's subjects not only to a quiet and unresisting submission, but insults them with a call to seek voluntarily the protection of that government.