In the days when Henry IV. of France was King of Navarre only, and in that little kingdom of hills and woods which occupies the southwest corner of the larger country, was with difficulty supporting the Huguenot cause against the French court and the Catholic League--in the days when every isolated castle, from the Garonne to the Pyrenees, was a bone of contention between the young king and the crafty queen-mother, Catherine de Medicis, a conference...