Note 6 — BOOK XV.

Bela IV., king of Hungary, wrote to the pope, that if he were not speedily succoured he should form an alliance with the Tartars. The pope reproved him warmly. Alexander IV. wrote to all Christian princes, prelates, and communities, to consult upon the means of resisting the barbarians, as well in the East as in the West. In Raynaldi—the year 1262, Nos. 29 and 30—his letter may be seen, in which he enters into many details upon the levy of soldiers, and upon subsidies. This letter has been preserved by Matthew Paris, who speaks of the councils held on this subject; some facts relative to the invasion of the Tartars may likewise be found in William of Nangis and Matthew of Westminster, as well as in the Collection of Councils.