The Blackfeet are bold enemies, and fond of hazardous exploits.  The band that were hovering about the neighborhood, finding that they had such pacific people to deal with, redoubled their daring.  The horses being now picketed before the lodges, a number of Blackfeet scouts penetrated in the early part of the night into the very centre of the camp.  Here they went about among the lodges as calmly and deliberately as if at home, quietly cutting loose the horses that stood picketed by the lodges of their sleeping owners.  One of these prowlers, more adventurous than the rest, approached a fire round which a group of Nez Perces were gambling with the most intense eagerness.  Here he stood for some time, muffled up in his robe, peering over the shoulders of the players, watching the changes of their countenances and the fluctuations of the game.  So completely engrossed were they, that the presence of this muffled eaves-dropper was unnoticed and, having executed his bravado, he retired undiscovered.

Having cut loose as many horses as they could conveniently carry off, the Blackfeet scouts rejoined their comrades, and all remained patiently round the camp.  By degrees the horses, finding themselves at liberty, took their route toward their customary grazing ground.  As they emerged from the camp they were silently taken possession of, until, having secured about thirty, the Blackfeet sprang on their backs and scampered off.  The clatter of hoofs startled the gamblers from their game.  They gave the alarm, which soon roused the sleepers from every lodge.  Still all was quiescent; no marshalling of forces, no saddling of steeds and dashing off in pursuit, no talk of retribution for their repeated outrages.  The patience of Captain Bonneville was at length exhausted.  He had played the part of a pacificator without success; he now altered his tone, and resolved, if possible, to rouse their war spirit.

Accordingly, convoking their chiefs, he inveighed against their craven policy, and urged the necessity of vigorous and retributive measures that would check the confidence and presumption of their enemies, if not inspire them with awe.  For this purpose, he advised that a war party should be immediately sent off on the trail of the marauders, to follow them, if necessary, into the very heart of the Blackfoot country, and not to leave them until they had taken signal vengeance.  Beside this, he recommended the organization of minor war parties, to make reprisals to the extent of the losses sustained.  “Unless you rouse yourselves from your apathy,” said he, “and strike some bold and decisive blow, you will cease to be considered men, or objects of manly warfare.  The very squaws and children of the Blackfeet will be set against you, while their warriors reserve themselves for nobler antagonists.”