The planned route was almost 2,000 miles. It went up the Mississippi River to the Ohio, then to the Allegheny, north on the Conewago River to Chautauqua Lake, continuing across to Lake to Prendergast Creek and onwards to Montreal by way of Lake Erie and Lake Ontario. The completed trip would be made by water without any land portages.
The gold was to be delivered to His Majestys Royal Governor in Montreal. It was to be guarded with their lives, the voyagers were told. Regardless of the hardships received in such a trip, the valuable cargo was not to be taken by the hated English or the Seneca Indians. The party consisted of about twenty Frenchmen, two Jesuit priests, and several friendly Indian scouts. They made it up the Mississippi River to the mouth of the Ohio River, where they are believed to have camped for several days. They repaired the rafts and built canoes to be used later on the more narrow streams further north. As they traveled up the Ohio, the priests made maps and checked locations for forts and settlements to be built or started later.
They almost certainly stopped at the Shawnee Indian village of Sonioto, at the north of the Scioto River, where Portsmouth, Ohio, is today. The Shawnee were good friends with the French. At the forks of the Ohio River the party camped again before turning north up the Allegheny. They were now approaching the lands of the hated Seneca Indians. The bloodthirsty warriors would like nothing better than to scalp a few Frenchmen. A few years before, the Senecas had raided and killed over 200 French settlers in and around Montral. The voyageurs wanted no part of this Indian nation, their worst enemy. They changed their planned route. It was decided not to make the trip up the Conewago but to continue on the Allegheny to its headquarters. By doing this they might not contact the Senecas at all.
At the head of the Allegheny, they could continue onto the Genessee River and then go on north to Lake Ontario. After turning southeast, it is believed that the Frenchmen reached a point near what is now Coudersport, Pennsylvania. They had been attacked by the Senecas several times during their trip up the Allegheny, but had fought them off. Realizing that Indian runners would bring enough warriors to annihilate them, the Frenchmen decided to bury the gold and continue the trip on foot to the Genessee River. They could return for the gold later.
The legend says that they traveled to what is now known as the Valley of Borie, in Potter County. Near a large rock as big as a house, they buried the kegs of gold. The priests chiseled a cross into the rock as a marker. A crude map was made of the area, and then the party headed back to the Allegheny. By traveling at night and hiding during the day, they finally made it to the Genessee River and on to Montreal. They reported to the Royal Governor that they had buried the gold near the head of the Allegheny River and had marked a large rock at the location
The Senecas learned about the rock in the Borie area that had a strange carving, like two crossed sticks, upon it. Thinking that the carving was a religious totem of the French, and therefore dangerous to them, the superstitious Indians never disturbed it.
Because of the war with the Senecas and the threat of the English, no record of the Frenchmen returning for the gold can be found. It is believed by many that somewhere near the head of the Allegheny River in Pennsylvania is a buried treasure of gold worth over $300,000. It has never been reported found.