And so, in the summer of 1679, the Chevalier sailed up the Lac du Dauphin, as Lake Erie was then called, into the Lac d'Orleans, or Huron, carrying letters in which Père Francis Xavier was ordered to leave his charge for a time in order to render all the assistance in his power to the explorers. The Bishop of Montreal could never have guessed with what heartfelt joy his command was obeyed. Father Xavier was tired of this peaceful life, tired of "the endless wash of melancholy waves," of the short cool summers, and long white blank of winter; tired of inaction, of the lack of stimulating surroundings, of the gentleness of Father Ignatius and Marie's haunting smile. Here, too, might be the very occasion he craved of making himself famous and deserving of reward as an explorer. It was true that he started as a subordinate, but that was no reason that he should return in the same capacity. Marie had served the noble guests with pleasant alacrity, passing the rainbow-tinted trout caught as well as broiled by her own hand, and the luscious huckleberries in tasteful baskets of her own braiding, and Tontz Main de Fer, the chivalric companion and friend of La Salle, was moved like Geraint, served by Enid, "to stoop and kiss the dainty little thumb that crossed the trencher." The salutation was received with unconscious dignity by little Marie; once only was Père François Xavier annoyed by the absence of a display of childish pleasure in an ever-ready smile.
History tells how trial and privation of every kind waited on this little band of heroic men; how hunger, and cold, and fever dogged their steps; how the Indians proved treacherous and hostile; how, having reached central Illinois, after incredible exertion, they found themselves in the dead of winter unable to proceed further, and surrounded by tribes incited against them by some unknown enemy. A fatality seemed to hang over them; suspicious occurrences indicated that they had a traitor among their number, but he was never discovered. La Salle did not despair or abandon the enterprise; but when six of his most trusted men mutinied and deserted, he lost hope, and became seized with a presentiment that he would never return from his expedition. Father Xavier was his confidant as well as confessor, but he seems not to have been able to disperse the gloom which settled over the leader's mind. Perhaps he did not endeavor to do so. Hopeless but still true to his trust, La Salle constructed near Peoria a fort which he named Crèvecoeur, in token of his despondency and disappointment. Leaving Tontz Main de Fer in command here with the greater part of his men, he set out with five for Frontenac, on the 2d of March, 1680, intending to return with supplies to take command again of his party, and to proceed southward. It was at this point that the most inexplicable event of the entire enterprise occurred. Before the party divided _some one_ attempted to poison the Chevalier La Salle. The poison was a subtle and slow one, similar in its effects to those used by the Borgia family; the secret of its manufacture was thought to be unknown out of Italy. Fortunately he had taken an under or overdose of it, and the effects manifested themselves only in a long illness. He was too far on his journey from Fort Heartbreak when stricken down to return to it, and was mercifully received and nursed back to health by the friendly Pottawottamies.