King James, having assembled all his forces, advanced towards Schomberg, and appeared before his intrenchments in order of battle; but the duke, knowing they were greatly superior in number of horse, and that his own army was undisciplined, and weakened by death and sickness, restrained his men within the lines, and in a little time the enemy retreated.

Immediately after their departure, a conspiracy was discovered in the English camp, hatched by some French papists, who had insinuated themselves into the protestant regiments.

One of these, whose name was Du Plessis, had written a letter to the ambassador D'Avaux, promising to desert with all the papists of the three French regiments in Schomberg's army.

This letter being found, Du Plessis and five accomplices were tried by a court-martial, and executed.

About two hundred and fifty papists being discovered in the French regiments, they were sent over to England, from thence to Holland.