French Poisoned Bullets

At Three Rivers website, you can read the book The Life and Times of Sir William Johnson, Vol. I.  where it says:  "In the three actions of this day, about two hundred and twenty of the Provincials were killed, and ninety-one wounded. Their loss was greater than it might otherwise have been, from the fact that several were hit by poisoned bullets; thus mere flesh wounds soon mortified, some of the soldiers dying in convulsions.(2)
(1) For a map of this action see appendix No. v.
(2) "Mical Harrington died of the wound he received through the fleshy part of the thigh, the ball undoubtedly poisoned; as also one Jonathan Burt, of Brimfield, by a poisoned ball through the arm; and one Brisbee, by a slight shot in the leg which threw him into convulsions. The art of man could not stop the mortification which seized the wounded part, and presently a few hours shut up the scene. Oh cursed malice, that the fatal lead should not be thought sufficient without being rolled up with a solution of copper and yellow arsenic, as I am thoughtful was the case, by many of the poisoned balls which were brought in out of their bullet pouches, taken among the plunder."-Manuscript letter, Surgeon Thomas Williams to his wife. This is the only instance, that I recollect, of the use of poisoned bullets in battle."