With all these drawbacks, however, the period from 1830-1848 witnessed a true regeneration--social, political, intellectual. Never had education made such marvellous progress. It is to this period that the country owes that revival of educational zeal and that improvement in schools and methods of teaching, which are the great glory of modern Switzerland. Canton vied with canton, and authority with authority, in their noble enthusiasm for education. Zurich, Bern, Thurgau, Solothurn, Vaud--all these founded excellent teachers' seminaries. Primary schools were improved, and secondary schools established in every canton, and in all the more important cities gymnasiums were founded. At Zurich these time-honoured institutions, the Chorherrenstift and the Carolinum, were in 1832 converted into the present gymnasium and university, and Bern made similar establishments in the following year. Thus were being gradually realized the noble aspirations of the "Helvetic" period, those of Stapfer particularly. Unfortunate conflicts with foreign powers, however, not seldom arose. Fugitives from other countries then as now made Switzerland their abode, and many of them abused her hospitality, and entangled her in dissensions with foreign governments, exactly as we find happening at the present moment. Many of the political _emigrés_ were men of great note, but space will permit of our noticing only two, Louis Philippe, and Louis Napoleon, afterwards Napoleon III. The Prince de Chartres lived for some years in Graubünden, occupying under the name of Chabaud, the position of mathematical master in an educational establishment of repute at Reichenau. Singularly enough he afterwards refused to the man who was to succeed him on the throne of France, the privilege of shelter in Swiss lands, that is to say, he objected very strongly. For in 1838 he suddenly requested that the Swiss Diet should give up Louis Napoleon, on the plea that he was an intriguer. This request was in reality a demand, and was more than the Swiss could stand. Napoleon was in fact a Swiss burgess, having become naturalized, and having passed through the military school at Thun, and become a captain in the Swiss army. His mother had for some time lived with her son in the castle of Arenenberg (in the Canton of Thurgau), which she had purchased soon after 1814. Thanks to the efforts of Dr. Kern, representative of that state in the Diet, the Swiss Government were able to disprove the charge made against Louis Napoleon, and the Diet firmly refused to expel the prince. France enraged threatened war to her "turbulent neighbour," and actually set on foot an army of twenty-five thousand men. Thoroughly roused, the Diet sent troops to the frontier, amidst general acclamations, Geneva and Vaud being conspicuous in their endeavours to protect their boundaries. These two cantons were specially thanked by the central government. The prince, however, cleared away difficulties by quitting the Swiss soil.[101]