As, however, it must unavoidably happen that, according to the plenty or scarcity of goods at market in proportion to the demand, the relative value would be subject to continual fluctuation, greater precision has been found necessary; and at this time the current value of a single bar of any kind is fixed by the whites at two shillings sterling.  Thus, a slave whose price is 15 pounds, is said to be worth 150 bars.

In transactions of this nature it is obvious that the white trader has infinitely the advantage over the African, whom, therefore, it is difficult to satisfy, for conscious of his own ignorance, he naturally becomes exceedingly suspicious and wavering; and, indeed, so very unsettled and jealous are the negroes in their dealings with the whites, that a bargain is never considered by the European as concluded until the purchase money is paid and the party has taken leave.

Having now brought together such general observations on the country and its inhabitants as occurred to me during my residence in the vicinity of the Gambia, I shall detain the reader no longer with introductory matter, but proceed, in the next chapter, to a regular detail of the incidents which happened, and the reflections which arose in my mind, in the course of my painful and perilous journey, from its commencement until my return to the Gambia.

CHAPTER III—­THE KINGDOM OF WOOLLI—­JOURNEY TO BONDOU

On the 2nd of December, 1795, I took my departure from the hospitable mansion of Dr. Laidley.  I was fortunately provided with a negro servant who spoke both the English and Mandingo tongues.  His name was Johnson.  He was a native of this part of Africa, and having in his youth been conveyed to Jamaica as a slave, he had been made free, and taken to England by his master, where he had resided many years, and at length found his way back to his native country.  As he was known to Dr. Laidley, the Doctor recommended him to me, and I hired him as my interpreter, at the rate of ten bars monthly to be paid to himself, and five bars a month to be paid to his wife during his absence.  Dr. Laidley furthermore provided me with a negro boy of his own, named Demba, a sprightly youth, who, besides Mandingo, spoke the language of the Serawoollies, an inland people (of whom mention will hereafter be made) residing on the banks of the Senegal; and to induce him to behave well, the Doctor promised him his freedom on his return, in case I should report favourably of his fidelity and services.  I was furnished with a horse for myself (a small but very hardy and spirited beast, which cost me to the value of 7 pounds 10s), and two asses for my interpreter and servant.  My baggage was light, consisting chiefly of provisions for two days; a small assortment of beads, amber, and tobacco, for the purchase of a fresh supply as I proceeded; a few changes of linen, and other necessary apparel; an umbrella, a pocket sextant, a magnetic compass, and a thermometer; together with two fowling-pieces, two pair of pistols, and some other small articles.