出典:Wikipedia
出典:『Wikipedia』 (2011/05/16 12:17 UTC 版)
The River Effra is a river in south London, England. It is now mainly underground. The name cannot be traced back much earlier than 1840 , so speculation that it came from a Celtic word for torrent is unwarranted. Probably it is also unrelated to the heah yfre 'high bank' at the river mouth mentioned in an Anglo-Saxon charter.