Foreign Office, May 22, 1815.

Gentlemen—I lost no time in laying before the Prince Regent the report made by Mr. Larpent and Mr. King, respectfully appointed on the part of his majesty's government, and that of the United States of America, to enquire into the circumstances of the late unfortunate occurrence at Dartmoor Prison.

His Royal Highness has commanded me to express, through you, to the government of America, how deeply he laments the consequences of this unhappy affair.

If any thing can tend to relieve the distress which his Royal Highness feels on this occasion, it is the consideration, that the conduct of the soldiers was not actuated from any spirit of animosity towards the prisoners, and that the inactivity of the officers may be attributed rather to the inexperience of militia forces, than to any want of zeal or inclination to afford that liberal protection which is ever due to prisoners of war.

But as his Royal Highness has observed, at the same time, with sincere regret, that although the firing of the troops upon the prisoners may have been justified at its commencement, by the turbulent conduct of the latter, yet that the extent of the calamity must be ascribed to a want of steadiness in the troops, and of exertion in the officers, calling for the most severe animadversion. His Royal Highness has been pleased to direct the commander in chief to address to the commanding officer of the Somerset militia, his disapprobation of the conduct of the troops, which it is trusted will make a due impression on the minds of the officers and men who were engaged in this unfortunate transaction.

As an additional proof of the sentiments which animate the Prince Regent on this occasion, I am further commanded to express his Royal Highness' desire to make a compensation to the widows and families of the sufferers; and I have to request that you, gentlemen, would make this known to your government, inviting them, at the same time, to co-operate with his majesty's charge d'affairs in the United States, in investigating the respective claims, for the purpose of fulfilling his Royal Highness' benevolent intentions upon this painful occasion.

I request that you will accept the assurance of the distinguished consideration with which I have the honor to be, &c.

(Signed)CASTLEREAGH.

To Henry Clay, Esq. and Albert Gallatin, Esq.

Copy of a letter from Messrs. Clay and Gallatin, to Lord Castlereagh.