The fort stood upon the bank of the river, about sixty yards from its
margin; and the purpose of the commander of the Indians was to undermine
this, and blow up the garrison. Duquesne was pushing the mine under the
fort with energy when his operations were discovered by the besieged.
The miners precipitated the earth which they excavated into the river;
and Boone, perceiving that the water was muddy below the fort, while it
was clear above, instantly divined the cause, and at once ordered a deep
trench to be cut inside the fort, to counteract the work of the enemy.

As the earth was dug up, it was thrown over the wall of the fort, in the
face of the besieging commander. Duquesne was thus informed that his
design had been discovered; and being convinced of the futility of any
further attempts of that kind he discontinued his mining operations, and
once more renewed the attack upon the Station in the manner of a regular
Indian siege. His success, however, was no better than it had been
before; the loss appeared to be all upon his side; his stock of
provisions was nearly exhausted; having for nine days tried the bravery
of his savage force, and tasked his own ingenuity to its utmost, he
raised the siege, and abandoned the grand object of the expedition.

During this siege, "the most formidable," says Mr. Marshall, "that had
ever taken place in Kentucky from the number of Indians, the skill of
the commanders, and the fierce countenances and savage dispositions of
the warriors," only two men belonging to the Station were killed, and
four others wounded.

Duquesne lost thirty-seven men, and had many wounded, who, according to
the invariable usage of the Indians, were immediately borne from the
scene of action.