help of hired assassins, put the inmates to the sword. This was on the 19th of July, 1620, and throughout the whole valley no quarter was given. Zurich and Bern on hearing of this shocking massacre--the "St. Bartholomew of the Valtellina"--sent troops, but they were defeated at Tirano by the Spanish forces and adherents. The Plantas returned from exile and asked the Forest Cantons to give their countenance to their party, and these were not unwilling; but the plot itself was opposed by the Protestant Grisons with scorn and fury. Jenatsch penetrated to the castle of the Plantas at Rietberg, and Pompejus fell by his hands (1621). The Catholics were defeated at Valendas, and the country was cleared of the troops of the Forest Cantons and of Spaniards. However, Jenatsch failed to take Valtellina. The Austrians still claimed supremacy over part of the _Zehngerichte_,[69] and we find them, from 1620 to 1629, twice invading and occupying Graubünden. The most dreadful cruelties marked the passage of their general, Baldiron, and Catholicism was reintroduced by force. In 1629, the Emperor Ferdinand had reached the height of his success and greatness, and Bünden with all its dependencies lay prostrate at his feet. France came to the rescue. Richelieu pursued the policy of Henry IV. to re-establish the balance of power by breaking down the prestige of the Habsburgs. With the view of gaining supremacy for France, he had drawn Sweden into the Thirty Years' War; and on the death of Gustavus Adolphus, when the zeal was somewhat flagging, he revived it by sending French troops into Alsace, South Germany, and the Grisons. The command of the Franco-Grison army was entrusted to Duke Henry de Rohan, godson of Henry IV. of France (and godfather to Charles I. of England), one of the noblest characters of his age. De Rohan was also appointed ambassador to the Eidgenossen states in 1631. He had been leader of the Huguenots, and had supported the Edict of Nantes in opposition to Louis XIII. Becoming obnoxious to the king in consequence, he withdrew to Venice. There he wrote a treatise on the strategical importance of the Grisons, as if he foresaw his future mission.[70] During his residence in Switzerland he watched zealously over its interests, smoothing over difficulties in the Diet to avoid war. Richelieu sent him neither money nor help, but left him to extricate himself as best he could from his position in that isolated mountain fastness; yet Rohan was the idol of his soldiers and of the people of the Grisons, and was always spoken of by them as the "good duke." In 1635, when France was doing its utmost to oust Austria, open war broke out, and Rohan gained four brilliant victories in succession--Jenatsch serving as local guide and combatant in advance, his superior tactics proving too much for the Austro-Spanish forces. Yet the "good duke" was soon to fall a victim to the perfidious policy of Richelieu, and the treachery of Jenatsch. This latter was a