Note 34 — Chapter V

“The Geerar is a typical mountain river in a country consisting almost wholly of impervious basaltic and granite rocks; it is evidently a furious torrent after rain, but dry except for the merest trickle at other times; it runs in a deep narrow valley, shut in, hot, and airless, and probably very unhealthy.” (Sir W. Garstin, “Report upon the Basin of the Upper Nile,” 1904.)