by Gerhard Rohlfs
by Victor Barrucand , Isabelle Eberhardt
by James Richardson
by Gerhard Rohlfs
by Hugh Clapperton , Dixon Denham , Walter Oudney
by James Richardson
by Isabelle Eberhardt
by M. F. (Milburg Francisco) Mansfield
by Gerhard Rohlfs
by George Edward Woodberry
by Gerhard Rohlfs