JETTE, the border made round the silts under a pier, in certain old bridges, being the same with starling; consisting of a strong framing of timber filled with stones, chalk, &c. to preserve the foundations of the piers from injury.
JILLIFREE is a town on the northern bank of the river Gambia, opposite to James's island, where the English had formerly a small fort. The kingdom of Barra, in which it is situated, produces great plenty of the necessaries of life; but the chief trade of the inhabitants is in salt, which they carry up the river in canoes; and, in return, bring down Indian corn, cotton cloths, elephants teeth, small quantities of gold dust, &c. "The number of canoes and people constantly employed in this trade, make the king of Barra (says Mr Park) more formidable to Europeans than any other chieftain on the river, and have encouraged him to establish those exorbitant duties, which traders of all nations are obliged to pay at entry, amounting nearly to L. 20 on