Belfast is another maritime town of Penobscot Bay on a deeply-indented harbor under the shadow of the Camden Hills, the place where Weymouth in 1605 landed and set up the cross. It was settled and named by Scotch-Irish Presbyterians in 1770, and it looks out pleasantly across the broad bay upon Castine. Above are Searsport and Fort Point, with the ruins of the colonial Fort Pownall, and then the river is quickly contracted into the Narrows, where the swift tides run at Bucksport. The upper river is sinuous and picturesque, and at the head of navigation, sixty miles from the sea, is Bangor, with twenty thousand people, finely located on commanding hills, its chief industry being the sawing and shipment of lumber. The sawmills line the shores and the log-booms extend for miles along the river. The chief assembly room of the city is the Norumbega Hall, and there also is a Theological Seminary of high standing. It is said that the settlement, which had languished during the Revolution, in 1791 ordered Rev. Seth Noble, its representative in the Legislature, to have it incorporated under the name of Sunbury, but he, being very fond of the old tune of Bangor, wrote that name inadvertently, and it thus was given the town. Thirteen miles northward is Oldtown, another great gathering-place for logs and sawmills, and having the Tarratine Indian settlement on the island in mid-stream. The Penobscot River receives various tributaries above, which drain the extensive northern forests of Maine--the Piscataquis coming from the westward, the Mattawamkeag from the northeast, and the Seboois. The main stream rises near the western Canada border of Maine and flows eastward into Chesuncook Lake, whence its general course to the sea is southeast and south. The river thus drains a broad basin, embracing myriads of lakes in the northern Maine forests, and it has an enormous water-power, as yet only partially utilized. MOUNT DESERT ISLAND.