"MY LORD,
"On the night of the 15th inst. the third division of boats, which I had the honour to command, assembled on board his majesty's ship York, agreeable to your lordship's directions; and, at eleven, P.M. by signal from the Medusa, proceeded, without loss of time, to attack the enemy's flotilla off Boulogne, as directed by your lordship. As I thought it most advisable to endeavour to reduce the largest vessel first, I lost no time in making the attack; but, in consequence of my leading the division, and the enemy opening a heavy fire from several of the batteries, thought it advisable to give the enemy as little time as possible, cut the tow-rope, and did not wait for the other boats, so that it was some little time before the heavy boats could get up. I received so many shots through the boat's bottom, that I soon found her in a sinking state; and, as it was not possible to stop so many shot-holes, was obliged, with the men, to take to another boat; and have the pleasure to acquaint your lordship that I received particular support from the boats of his majesty's ship York, which soon came up with the rest of the division I had the honour to command. But, finding no prospect of success, and the number of men killed and wounded in the different boats, with the constant fire from the shore of grape and small-arms, thought it for the good of his majesty's service to withdraw the boats between two and three in the morning; as we could not board her, although every effort was made.
I have the honour to be, &c.
Isaac Cotgrave."