Lieut.-Colonel J.M'cDonell and Captain Glegg were accordingly deputed by me on this mission, and returned within an hour with the conditions, which I have the honor herewith to transmit.

Certain considerations afterwards induced me to agree to the two supplementary articles.
The force thus surrendered to his majesty's arms cannot be estimated at less than 2,500 men.

In this estimate, Colonel M'cArthur's detachment is included, as he surrendered, agreeably to the terms of capitulation, in the course of the evening, with the exception of 200 men, whom he left escorting a valuable convoy at some little distance in his rear; but there can be no doubt the officer commanding will consider himself equally bound by the capitulation.
The enemy's aggregate force was divided into two troops of cavalry; one company of artillery, regulars; the 4th United States' regiment; detachments of the 1st and 3d United States' regiments, volunteers; three regiments of the Ohio militia; one regiment of the Michigan territory.
Thirty-three pieces of brass and iron ordnance have already been secured.
When this contest commenced, many of the Indian nations were engaged in active warfare with the United States, notwithstanding the constant endeavours of this government to dissuade them from it.

Some of the principal chiefs happened to be at Amherstburg, trying to procure a supply of arms and ammunition, which for years had been withheld, agreeably to the instructions received from Sir James Craig, and since repeated by your excellency.
From that moment they took a most active part, and appeared foremost on every occasion; they were led yesterday by Colonel Elliott and Captain M'Kee, and nothing could exceed their order and steadiness.

A few prisoners were taken by them during the advance, whom they treated with every humanity; and it affords me much pleasure in assuring your excellency, that such was their forbearance and attention to what was required of them, that the enemy sustained no other loss in men than what was occasioned by the fire of our batteries.
The high sense I entertain of the abilities and judgment of Lieut-Colonel Myers, induced me to appoint him to the important command at Niagara; it was with reluctance I deprived myself of his assistance, but I had no other expedient; his duties, as head of the quartermaster-general's department, were performed to my satisfaction by Lieut.-Colonel Nichol, quartermaster-general of the militia.
Captain Glegg, my aide-de-camp, will have the honor of delivering this dispatch to your excellency; he is charged with the colours taken at the capture of Fort Detroit, and those of the 4th United States' regiment.
Captain Glegg is capable of giving your excellency every information respecting the state of this province, and I shall esteem myself highly indebted to your excellency, to afford him that protection to which his merit and length of service give him a powerful claim.[81] I have the honor to be, &c.
P.S .-- I have the honor to enclose a copy of a proclamation which I issued immediately on taking possession of this country.
I should have mentioned in the body of my dispatch, the capture of the Adams; she is a fine vessel, and recently repaired, but without arms.
_Sir George Prevost to Major-General Brock._ Head Quarters, Montreal, Aug.