A correspondent at St. Louis informs us that in consequence of the late hostility of the Indians in that quarter, the situation of the country had become more critical than at any time since the war. Small parties of savages had penetrated the frontier at different points—and that general Howard was prepaving a force to proceed with all possible expedition to the relief of the garrison at Prarie du Chien. The general impression was that that post could not long be maintained. When the British demanded its surrender, Lieut. Perkins replied, “ that as long as a soldier remained alive, it should he defended.** From the determined character of this officer, and the excellent state of the fort, we are induced to hope that gen. Howard will succeed in relieving the garrison.Kentucky Gazette,