It marked the ancient border with Nubia to the south and was the conduit for the camel caravan trade in African products such as gold, ivory, and spices.
Camels were used to trade goods.
Africans did not trade gold.
two men are looking at a bunch of paper
Carolyn McCarthy's husband was murdered.
It came as a big relief to her that Mrs. Vandemeyer was on the bed.
The Imperial Palace is in Kyoto.
Paul Krugman believes that journalists know more about economics than he does.
There are people standing inside a building.