On July 15, 1758, Post departed from Philadelphia with five Indian guides. He carried with him copies of the treaties made with Tedyuskung, belts of wampum and messages from the Governor. He made his trip by way of Bethlehem, Shamokin, Great Island, Chinclamoose, etc.
It was a perilous journey. Twice he got lost in the woods, and one of his guides strayed away and could not be found. Without food and drenched with rain, night after night he slept on the cold, wet ground. He was frequently very near the French. Finally he arrived at King Beaver’s, who ruled over the Delaware in the West. These Indians remembered him when he preached the gospel at Wyoming, and were glad to see him. They gave him a public dinner, to which they invited the surrounding[surrounding] tribes.
The French sent spies to watch him and to induce him to go to Fort Duquesne. Post refused to be trapped, but instead succeeded in making arrangements for kindling a great council-fire at Easton in October following.
Post now set out on his return and had not proceeded far when he heard the thunder of nineteen cannon discharged at the fort. Under the very mouths of these guns he had, singly and alone, with the full knowledge of the French, laid a plan which rent asunder the alliance between them and their Indian allies.
Post succeeded in his mission, and the French at the fort, finding themselves abandoned by their allies, fired it and fled, as the invalid general, John Forbes, and his army made their appearance.
Frank Cowan, poet of Southwestern Pennsylvania, tells the story in one of his songs, of which the following is a verse:
“The Head of Iron from his couch,
Gave courage and command,
Which Washington, Bouquet and Grant
Repeated to the band;