The People of the River by Edgar Wallace

ABIBOO told Sanders that an Arabi had come to see him, and Arabs are rare on the coast, though certain dark men of Semitic origin have that honorary title.

Sanders came out to his stoep expecting to find a Kano, and was surprised to see, squatting by the edge of the raised verandah, a man of true Moorish type. He sat with his hands about his knees wrapped in a spotless white djellab.