"Known at Eton as "Hojo", William Hope Jones was a maths teacher noted for his eccentricity; he was feared among the Scouts for his loud, stentorian singing."

He appears in fiction in MR James ghost story Wailing Well, in which a group of masters take the Eton Scout Troop on an ill-fated camping expedition.

http://www.users.globalnet.co.uk/~pardos/ArchiveWailing.html

I've just blogged the detective work at
http://ukcommentators.blogspot.com/2007/04/national-anthem-of-ancient-britons.html