He made a formal complaint against Colonel Hanau, for refusing to delay the execution until he could lay the matter before the general.

As for his own conduct in the matter, he said he was perfectly prepared to defend it before any military court, but that court must be held in England, where he purposed to return at once, with the division his majesty had intrusted to his command.
The Dutch general had, long before he received the letter, been informed of what had taken place, and had also learned that the English division had struck their tents, and were drawn up under arms.

To allow them to depart would be to entail certain ruin upon the campaign, and he felt that it was more than probable that the course Hamilton and his officers had taken would be upheld by a military court in England, and that public opinion would condemn the execution of an officer, taken in fair fight.
He therefore wrote a letter to General Hamilton, saying that he regretted to find that he had been acting under a misapprehension, for he had understood that the person claiming to be an Irish officer was in fact a spy, and that he had severely reprimanded Colonel Hanau for his refusal to delay the execution until the fact had been explained to him.

Far from feeling in any way aggrieved that General Hamilton had interfered to prevent such a mistake from taking place, he felt much obliged to him for what he had done, as the execution of an Irish officer taken in war would, in every way, have been a most unfortunate circumstance.
General Hamilton showed the letter to the colonels of the various regiments in the division, and these agreed that, as General Ginckle was evidently desirous that the matter should go no further, it would be as well to order the tents to be again pitched, and for the troops to resume their ordinary duties.
"My dear Walter," Colonel L'Estrange said, "I am happy, indeed, that we came up when we did.

What should I have felt, if I had afterwards learned that you, who had saved my life, had been murdered here, for your execution would have been neither more nor less than murder, as was that of the twelve poor fellows who were taken at Kilcowan--a brutal murder! They were perfectly justified in defending their property, and the idea of quartering them, as well as hanging them, just as if they were traitors of the worst dye, is nothing short of monstrous.
"I only came out here with my regiment a month since, but I am heartily sick with what I see going on.