Father Hidalgo could have acquired knowledge of the Caddo area from the reports of De Leon, Teran and Father Massinetes, but he would have not had the knowledge of the waterways, which could have only been obtained from the Natchitoches Indians who may have come to the Campti from their location on the north shore of Lake Pontchartrain; information was given to Flores and Colliea and passed on to Hidalgo.

The letter was an invitation “to come and trade” with the Hidalgo mission, the word “trade” being used as bait could have come from two sources, that of Bejoux to the Ais and that of Flores and Colliea. It is possible that Hidalgo wrote the letters very early in the year so that one could be sent to the Ais Tribe ahead of the arrival of Allarge Bejoux. The later two letters were carried in the Fall of the year by Flores and Colliea, who in turn gave the letters directly to a Natchitoches Indian who had come to the Campti, but who was living on the north shore of Lake Pontchartrain. Several historians say that St. Denis had the letter in his possession before it was presented to Governor Cadillac. St. Denis through his association with the Natchitoches Indians, who were settled near his Fort Louis, would have been the most logical Frenchman to receive the letter. Then, too, St. Denis, while vying with Cadillac to be sent as the leader on the trading expedition to the Hidalgo mission, had stated that he and Jules Lambert, who was at that time in the Illinois country, had been on a trading trip to the Natchitoches Indians in the summers of 1710 and 1712. Here, then, is another possibility that St. Denis may have received the first letter sent by Francois Hidalgo by an Indian messenger to the Ais, and who was instructed to give the letter to the first Frenchman who came to trade in his area.

The letter had the desired effect; St. Denis was appointed to lead the expedition. Cadillac chose wisely because St. Denis was an educated man, and was a third generation Canadian and, further, he understood the ways of the Indians. He was a linguist and could speak many Indian dialects, and also speak, read and write in Spanish.

The trading expedition, consisting of Indians of the Natchitoches tribe, left Biloxi in mid October, 1713. Among the Indians were the White Chief, his son, Koanan, and two daughters, one called Quilchil, “the pretty weaver,” and the other called Olchogonime, “the good girl.”

The Jean Penicaut narrative is an actual eye witness account of St. Denis’ journey to Natchitoches and on to Mexico. The party consisted of nearly forty Indians and twenty-three Frenchmen, two of whom were St. Denis and Penicaut, and several French traders, Pierre Largen, Jean Lagross, Roberto Talon, Pedro Talon, Lafrinaries, Allarge Bejoux, Labinaries, Enrique Lantillac; Medar Jalot, who was valet and doctor to St. Denis; the two Barberousse brothers were hunters for the party’s food; Rambin was a tailor. Soldiers in the party included Lt. Phillippe Blondell, De Lery, De Muy, Williard Anvillaries, De Beaulieux, De Voixant, Frainbouis, and Lavasseur, who was also a map maker.

Leaving Biloxi, the party traveled what was then known as the Iberville passage, crossing Lake Pontchartrain and through Manchac Pass to Lake Maurepas, then into Manchac Bayou and a short portage to the Mississippi River; ascending the Mississippi to the confluence of the Red River at Baton Rouge, then ascending the Red River to a point opposite the present day town of Colfax. Here the stream divided and Penicaut wrote, “we took the left and larger branch of water.” After some distance upstream he describes the Ecore de La Croix, which must have been the high bluffs near Chopin, Louisiana.

On November 25, 1713, the St. Denis party arrived among the Natchitoches Indians, living on an island that the river formed by dividing into two branches and flowing around it.

St. Denis spent the first few weeks cultivating the friendship of the Indians. Trade was vigorous and profitable, he sent at least twice back to Biloxi for more trade goods. He had traveled at least once as far as the settlement of the Nacogdoches Indians before deciding on an exact location for a trading post. In early Spring of the following year two block houses were erected in the Natchitoches Village, one to store the merchandise and the other to house the ten Frenchmen who were to remain in Natchitoches while the others went west in search of the Hidalgo mission.

While St. Denis was among the Hasinai Indians, an incident happened which causes one to wonder at the foresightedness of Francois Hidalgo. Among the Indians was an Indian maid named Angelica who had received instructions at a Spanish mission and who spoke Spanish fluently. She became the interpreter between St. Denis and Bernardino, Chief of the Hasinai. Bernardino, with some of the members of his tribe, acted as guide, for St. Denis, but instead of bringing the Frenchmen to the Hidalgo mission, they were led to Presidio San Juan Bautista on the south bank of the Rio Grande River on July 19, 1714. Surely these Indians would have known where the Hidalgo mission was located; the leading of the Frenchmen to the Spanish post was just as Hidalgo would have wished, or planned.