Records of the British trading vessel Sarah in 1790 and records of an English trial in 1788 both give the name of the head trader in Douala as King George. These were likely names given Doo by the traders, who also bestowed on him the title of king (kine in Duala). George possessed kalati, trade books in which credit records were kept and the mark of a major trader in Duala eyes.
The records from 1790 and 1788 suggest that King George was a prominent figure in Douala's trading scene. The traders likely gave him the name "King George" and bestowed upon him the title of king (kine in Duala).  His trade books, called kalati, served as evidence of his significant role in the city's commerce.