The song about the wonderful giants of old is a Harrow school song and one of Churchill's favourites. I pinched the lyrics from this fine essay on Churchill's education.
(and while googling for it I also found it quoted by a Somali Harrovian)
"Things fall apart, the centre cannot hold" - W.B. Yeats. "We're doomed !" - Private Frazer. "Like scrolling through a decade's worth of Daily Mail editorials in 20 minutes" - TheLoonyFromCatford