Interesting Collection of Two Albums with 49 Original Gelatin Silver Photographs of Beach Sand Mining in French West Africa (Possibly for Gold or Heavy Minerals), Showing Native Workers Digging the Sand, Transporting it to the Drying and Processing Plant, and Thence to the Loading Area on the Beach, Where it is Taken by Pirogues and Barges to the Cargo Vessels at Sea. Ca. 1920s-1930.