Substance of Letters of this date from Captain Douglas, at Quebeck, received at the Admiralty Office, London: He is devising the best means of getting through the Rapids of Chambly into Lake Champlain the six armed vessels, one of which has already arrived from England, and the others are hourly expected

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Admiralty Office, London, July 30, 1776.

By letters from Captain Douglas, of his Majesty' s ship Isis, dated at Quebeck, the 26th and 27th of last month, it appears that immediately after raising the siege of Quebeck, of which he gave an account in his letters of the 8th and 15th of May, every proper measure was taken to facilitate the further operations against the Rebels, by sending down the river all the pilots which could be procured, to bring up the transports that were daily expected with General Burgoyne from England and Ireland; and that no time might be lost on their arrival, he had provided pilots for the upper river, and placed frigates and armed vessels in proper stations to assist and escort them; and also, lest the transports should be prevented by contrary winds from sailing up the river, he had stationed vessels with provisions, at proper places, for the use of the troops, if they should be obliged to disembark and march by land. By these dispositions, all the transports with troops which had pilots on board, proceeded up the river, without stopping at Quebeck, and arrived at Three-Riverstime enough to defeat the Rebels, and afterwards drive them from St˙ Johns and all their posts below Lake Champlain. Captain Douglas, in the same letter, says that the prudent and spirited behaviour of Captain Harvey, of the Martin sloop, cannot be too much commended; and that the zeal, vigour and unanimity of his Majesty' s servants, on both elements, were scarcely equalled on any other occasion within his remembrance. He also writes that he was, in concert with General Carleton, considering upon a proper establishment for armed vessels to be employed on the Lakes Champlain and Ontario, and in contriving the most expeditious means of getting them, with other craft, on the said Lakes, in order to the better accelerating the passage of the Army; and that Captain Harvey, of the Martin, was returning to Sorel, in order to examine into the means of floating between camels, (as is practised in Russia and Holland,) through the Rapids of Chambly into Lake Champlain, the six armed vessels, one of which was already arrived from England, and the others hourly expected.