Kancaba, West Africa (Google Maps ⧉, OpenStreetMap ⧉)

"…he departed for Kancaba, a large town on the banks of the Niger and a great slave‐market."

"this quantity must have borne a very small proportion to the gold collected at Kancaba, Kankaree, and some other large towns."

"From Sego they were sent, in company with a number of other captives, up the Niger in two large canoes, and offered for sale at Yamina, Bammakoo, and Kancaba;"