[Senegal expedition]

..... and on the morning of the 13th it was discovered, that the French
(probably the militia, who were disaffected) had broken the boom, and abandoned
the vessels and the battery, leaving their colours flying upon both. Shortly
afterwards a letter was brought from the commandant, offering to capitulate; and
in the course of the day terms were agreed upon, surrendering the colony of
Senegal to the British arms.

This harassing and not unimportant service was effected with a loss to the
British, besides that of Captain Parker of the Derwent, comparatively slight :
one midshipman was drowned, one lieutenant of the troops died in the field from
fatigue, and one man was wounded by the enemy's fire. The loss on the part of
the French appears to have been also of trifling amount, not exceeding one man
killed and two wounded.

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[another account]

Senegal Surrenders
Captain Columbine, late commander of his Majesty's sloop the Solebay, and Major
Maxwell, commanding the garrison at Gorée, had previously determined to make an
attack upon Senegal, and proceeded against it on the 4th of July, with the
Solebay, Derwent sloop, and Tigress gun-vessel, and some merchant and smaller
vessels, having on board a detachment of one hundred and sixty men from Gorée.
The enemy at first appeared disposed to offer some resistance, but the
detachment being landed, together with one hundred and twenty seamen and fifty
marines, the enemy's force, consisting of one hundred and sixty regulars, and
two hundred and forty militia, retreated, and on the 13th a capitulation was
signed, by which the Island of St. Louis, and its dependencies, were surrendered
to the British forces, the garrison being conveyed to France as prisoners of
war, not to serve against his Majesty or his allies, until regularly exchanged.
The only loss sustained by the English on this service, has been that of
Captain Frederick Parker, of the Derwent, Mr. Francis Atterbury Sealy,
midshipman of that sloop, and six seamen, drowned in attempting to cross the Bar
of Senegal....