Here is what the Encyclopaedia Britannica has to say about the town of Sokoto....
.... capital and largest town of Sokoto state, northwestern Nigeria. It lies along the Sokoto (Kebbi) River just east of the latter's junction with the Rima River. The town, some 50 miles (80 km) south of the Republic of Niger border, lies on a traditional caravan route that leads northward across the Sahara.
The picture on this page was taken by Ted Jefferies in 1958. The camels here certainly do look as if they've just had a long walk across the Sahara.
To see a more modern method of crossing the Sahara, there is a picture of an aircraft arriving in 1951, welcomed by a horn-playing Hausaman on foot.
See also afpics for more pictures.
Copyright David Jefferies 2005.
D.Jefferies@ee.surrey.ac.uk 20th March 2005.