The rails were rusty but mainly intact, and not more than half the ties had rotted away. Walking or running on such a surface was very difficult; but I did my best, and on the whole made very fair time. For some distance the line kept on along the gorge's brink, but at length I reached the long covered bridge where it crossed the chasm at a dizzying height. The condition of this bridge would determine my next step. If humanly possible, I would use it; if not, l would have to risk more street wandering and take the nearest intact highway bridge.