281 books • 8 series
Two Trips to Gorilla Land and the Cataracts of the Congo (Volume 1)
Abeokuta and the Camaroons Mountains: Volume 1
A Mission to Gelele, King of Dahome: Volume 1
The Lake Regions of Central Africa: Volume 1
Two Trips to Gorilla Land and the Cataracts of the Congo, Volume 2
Unexplored Syria: Volume 2