Note 117 — Chapter I · (continued 2)

I have already called the reader’s attention to the fact that M. Walckenaer had carried this position at least two degrees farther west than the old maps. Subsequent observations, which I have employed myself in collecting, have proved that a change in this direction was necessary. To judge of its extent it was essential to have good observations taken at Galam, (or at Bakel), as well as a new itinerary between Senegambia and the Dhioliba. It is on these more accurate data that I have endeavoured to work.