The next day at sunrise the fleet of boats reached Big Salmon river, with the exception of one, which kept on, under the pretence of going direct to Sackett's Harbor, and fell into the hands of the blockading squadron, giving it information of the approach of the others. Woolsey, knowing that he could not run the blockade, had resolved to land his guns at Big Sandy creek and transport them by land eight miles distant, to Sackett's Harbor. Having reached the mouth of the creek in safety, he ascended two miles and landed. In the mean time Sir James Yeo had dispatched two gun-boats, with three cutters and a gig, in search of him. Finding the fleet had ascended Big Sandy creek, Captains Popham and Spilsbury, who commanded the expedition, followed after. The soldiers and marines were landed a mile or more below where Woolsey was unloading, and moved forward, keeping parallel with the gun-boats, which incessantly probed the thickets, as they advanced, with grape shot. Major Appling, who commanded the American riflemen, placed them and his Indian allies in ambush about half a mile below the American barges. Allowing the enemy to approach within close range, he suddenly poured in a destructive volley, which so paralyzed them that they threw down their arms and begged for quarter. All the boats, officers, and men were taken, making a total loss of a hundred and eighty-six men. The guns were then carried across to Sackett's Harbor, and the new ship Superior armed, which so strengthened Chauncey's force that Sir James Yeo raised the blockade and sailed for the Canada shore. [Sidenote: July 3.] At last the expedition against Mackinaw got under way. Two war brigs, the Lawrence and Niagara, together with several smaller vessels, carrying in all nine hundred men, began slowly to traverse the inland seas from Detroit to Mackinaw. Nothing but canoes and batteaux had hitherto floated on those scarcely known waters, with the exception of a single schooner or sloop, which made an annual solitary trip to the extreme north-western posts to carry supplies. More than a thousand miles from the ocean, and lifted nearly six hundred feet above it, those vast seas rolled their waves through unbroken forests. This was the first fleet that ever penetrated those solitudes, through which roamed unscared beasts of prey, and from whose further margin stretched away those immense prairies that go rolling up to the base of the Rocky Mountains. Amid unknown rocks and shoals--feeling its way along narrow channels--at one moment almost grazing the sand-bars with its keels, and the next moment floating over water nearly a thousand feet deep--now traversing groups of beautiful islands, and anon skirting the bases of precipices, on whose summit waved forests that had stood undisturbed since the birth of time--that little fleet crept on towards its destination. Its progress was so slow that Colonel McDowell, commanding at Mackinaw, had ample time to make preparations for defence.