Simultaneous with these two invasions of our territory, a British force was sent against Machias. The misfortune which befel the Adams, sloop-of-war, compelling her to take refuge at Hampden, in the Penobscot river, caused a change in the movements of the expedition, and it did not stop to take Machias, but seized Castine and Belfast, on the Penobscot bay, then pushed on with a sloop of war and small craft carrying in all 700 men, to capture this vessel. [Sidenote: Sept 9.] Machias was then seized, and all the country east of Penobscot taken possession of. [Sidenote: July 14.] The islands in Passamaquoddy bay had been seized and occupied two months previous. Our whole maritime coast was still threatened, and every seaport of any magnitude, was fortifying itself when Congress assembled again. The only other military movement of note during this fall, was an expedition which set out from Detroit, under the command of General McArthur. It consisted of 700 mounted men, seventy of whom were Indians, and for secresy, daring and skill was not surpassed during the war. Its object was to prevent the enemy from molesting Michigan during the winter, and if successful in its operations, eventually attack Burlington Heights, and form a junction with Generals Brown and Izard. This body of seven hundred bold and well-mounted borderers, left Detroit the 22d of October, and plunged at once into the wilderness. [Sidenote: Oct 22.] The long and straggling column would now be seen wading along the shallow shores of the lake, and then be lost in the primeval forest, to reappear on the bank of deep rivers, from whose farther shore the wilderness again spread away. The bivouac by night in the autumnal woods, or on the bank of a stream, presented a fine subject for a painter. Their seven hundred horses tied to the trees around, only half relieved by the ruddy fire that strove in vain to pierce the limitless gloom--the lofty trunks of trees receding away like the columns in some old dimly-lighted cathedral--the hardy and rough-looking frontiersmen, stretched with the half-clad savages around the fire--the sentinels scarcely discernible in the distance, all combined to form a picture which has a charm even for the most civilized and refined.