Then something remarkable happened. Starting around 1706, the Spanish authorities in Santa Fe began to notice a striking change in the behavior of their hated adversaries.2 They were, it seemed, disappearing, or at least moving off, generally to the south and west. Raiding had virtually stopped. It was as though a treaty of peace had been signed, but nothing of the sort had happened. The Spanish civil and military establishments began to realize that some sort of catastrophe had befallen the Apaches, though the extent of it would not be clear for years to come. In 1719 a military expedition to
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