The massive grey ruins of Tulliallan Castle are in the woods close behind Kincardine. This also was once a stronghold of the Bruces--in fact, it is "Bruce Country" all the way along this northern shore of the Forth, until we come to the last constriction of the estuary, over which the great railway bridge is being thrown at Queensferry. The spidery red limbs of this new giant bestriding the sea begin to come in sight after passing Kincardine Ferry and rounding Longannet Point. For now, especially when the broad mudbanks of the foreshore are covered at high water, the river takes a truly spacious expansion; the salt water begins to assert dominion over the fresh, and the line of the southern bank retires to the distance of three or four miles. It is no great loss; for Grangemouth and Bo'ness are little other than ports for the shipment of coal and pig-iron. The Carron Works show like pillars of fire by night and pillars of smoke by day, hiding Falkirk and Camelon and other spots of historic note. Further east the low shore-line is backed by a monotonous ridge that shuts us out from sight of the valley of which Linlithgow, with its loch and royal palace, is the centre; and even the woods of Kinneil, and the knowledge that along this crest, starting on the shore near the old Roman station of Carriden, run the remains of "Grime's Dyke"--the Wall of Antonine--fail to make the southern side a joy to the eye. There is metal more attractive near at hand, within the sweep of the Bay of Culross.