On the 22nd September, the plan of the campaign was minutely described in a government order, and operations were fixed for the 7th of October. Its main features may be briefly stated:--The Oyster Bay and Big River tribes, as the most sanguinary, were first marked out for pursuit. They were to be driven within the county of Buckingham; the utmost care being employed to prevent escape through the lines, while chasing them to Tasman's Peninsula. A chain of posts was occupied, under Captain Welman, from St. Patrick's Head on the east coast; including the source of St. Paul's River, and stretching to Campbell Town. A second chain, under Major Douglas, extending from Campbell Town, passed south of the Macquarie, to its junction with the Lake River. Both divisions, marching in a southerly direction, formed a line from Oyster Bay tier to Lackey's Mills. During these manoeuvres, a party were sent to examine the tier, extending from Swan River to Spring Bay; carefully, however, concealing the movement from the natives, lest they should be deterred from passing the subjacent isthmus. Other parties were employed, under Captain Wentworth, to force the aborigines from the neighbourhood of the lakes in the west, towards the same centre, advancing due east to the Jordan. The lines being compressed and thickened, and joined by the settlers on their march, were then moved forward, followed by scouring parties, to guard against their escape, should the natives cross the line. Fires were kept burning to direct the troops, who were expected to march in unbroken order. Captain Donaldson, who directed the operations in the north of the island, swept over the vast extent of country from Norfolk Plains to the Ouse--from Sorell Lake to Lake Echo. There he remained, closing the avenues of escape, while Douglass and Wentworth advanced to their last position: he then joined the main body. Twenty-two parties, under Major Douglas, and fifteen under Captain Wentworth, were then sent within the lines, to catch the natives, or drive them toward Tasman's Peninsula.