The Austrians still held Mantua, which Napoleon now besieged, occupying himself at the same time in consolidating his conquests. The Austrians made strenuous efforts to save the fortress. They were much superior in number to the French, but were defeated again and again by the rapidity and genius of their opponent. Finally, at the end of October, an Austrian army of 50,000, but mostly recruits, advanced under Alvinzi. Then followed the three days' battle of Arcola, during which Napoleon had a very narrow escape, but which ended in Alvinzi's defeat and retreat on Tyrol. From Arcola Napoleon dated his firm belief in his own fortune. Once again, in January, 1797, Alvinzi tried to relieve Mantua. But Napoleon moved in full force on Rivoli, and won a decisive battle there on January 14th, the Austrian detachment on the Lower Adige having to lay down their arms next day at Roverbella. Wuermser capitulated at Mantua on February 2d, Napoleon treating him with generosity. This first Italian campaign was perhaps the most skilful of all those of Napoleon. Everything was done accurately and rapidly, and without throwing away chances. Some of his later campaigns, though equally brilliant, show him acting more with the gambler's spirit, running unnecessary risks with almost a blind reliance upon his star, in the hope of obtaining results which should dazzle the world. In political matters during this time Napoleon was acting less as a servant of the French Directory than as an independent ruler. He entirely ignored the instructions he received from Paris, levying contributions, entering into negotiations, and deposing princes at his own will, and writing that he is not fighting "for those rascals of lawyers." [Illustration: Napoleon and the Sphinx.]