Yesterday fifty-three Delaware Indians came from Kansas to serve under the General. Years ago he made friends of the Delawares, when travelling through their country upon his first journey of exploration; and hearing that he was on the war-path, the tribe have sent their best young warriors to join him. They are descendants of the famous tribe which once dwelt on the Delaware River, and belonged to the confederacy of the Six Nations, for more than two centuries the most powerful Indian community in America. Their ancient prowess remains. The Delawares are feared all over the Plains, and their war-parties have often penetrated beyond the Rocky Mountains, carrying terror through all the Indian tribes. These men are fine specimens of their race,--tall, lightly formed, and agile. They ride little shaggy ponies, rough enough to look at, but very hardy and active; and they are armed with the old American rifle, the traditional weapon which Cooper places in the hands of his red heroes. They are led by the chief of their tribe, Fall-Leaf, a dignified personage, past the noon of life, but showing in his erect form and dark eye that the fires of manhood burn with undiminished vigor. THE SITUATION. _Springfield, November 1st._ It is certain that Price left Neosho on Monday and is moving towards us. He probably heard how small the force was with which the General arrived here, and thinks that he can overwhelm us before the other divisions come up. We have had some fear of this ourselves, and all the dispositions have been made for a stubborn defence in case we are attacked. The last two nights we have slept on our arms, with our horses saddled and baggage packed. Now all danger is past: a part of Pope's division came in this morning, and McKinstry is close at hand. He has marched nearly seventy miles in three days. The evidence that Price is advancing is conclusive. Our scouts have reported that he was moving, and numerous deserters have confirmed these reports; but we have other evidence of the most undoubted reliability. During the last two days, hundreds of men, women, and children have come into our lines,--Union people who fled at the approach of the Rebels. I have talked with a number of these fugitives who reside southwest from here, and they all represent the roads to be filled with vast numbers of men and teams going towards Wilson's Creek. They give the most exaggerated estimates of the number of the enemy, placing them at from fifty thousand to one hundred and twenty-five thousand men; but the scouts and deserters say that the whole force does not exceed thirty-two thousand, and of these a large number are poorly armed and quite undisciplined. Hunter has not come up, nor has he been heard from directly, but there is a report that yesterday he had not left the Osage: if this be true, he will not be here in time for the battle.