The great defensive strength of this plateau had from the first attracted his attention. There the Adige in a sharp bend westward approaches within six miles of Lake Garda. There, too, the mountains, which hem in the gorge of the river on its right bank, bend away towards the lake and leave a vast natural amphitheatre, near the centre of which rises the irregular plateau that commands the exit from Tyrol. Over this plateau towers on the north Monte Baldo, which, near the river gorge, sends out southward a sloping ridge, known as San Marco, connecting it with the plateau. At the foot of this spur is the summit of the road which leads the traveller from Trent to Verona; and, as he halts at the top of the zigzag, near the village of Rivoli, his eye sweeps over the winding gorge of the river beneath, the threatening mass of Monte Baldo on the north, and on the west of the village he gazes down on a natural depression which has been sharply furrowed by a torrent. The least experienced eye can see that the position is one of great strength. It is a veritable parade ground among the mountains, almost cut off from them by the ceaseless action of water, and destined for the defence of the plains of Italy. A small force posted at the head of the winding roadway can hold at bay an army toiling up from the valley; but, as at Thermopylae, the position is liable to be outflanked by an enterprising foe, who should scale the footpath leading over the western offshoots of Monte Baldo, and, fording the stream at its foot, should then advance eastwards against the village. This, in part, was Alvintzy's plan, and having nearly 28,000 men,[71] he doubted not that his enveloping tactics must capture Joubert's division of 10,000 men. So daunted was even this brave general by the superior force of his foes that he had ordered a retreat southwards when an aide-de-camp arrived at full gallop and ordered him to hold Rivoli at all costs. Bonaparte's arrival at 4 a.m. explained the order, and an attack made during the darkness wrested from the Austrians the chapel on the San Marco ridge which stands on the ridge above the zigzag track. The reflection of the Austrian watch-fires in the wintry sky showed him their general position. To an unskilled observer the wide sweep of the glare portended ruin for the French. To the eye of Bonaparte the sight brought hope. It proved that his foes were still bent on their old plan of enveloping him: and from information which he treacherously received from Alvintzy's staff he must have known that that commander had far fewer than the 45,000 men which he ascribed to him in bulletins. [Illustration: NEIGHBOURHOOD OF RIVOLI.]