Come boys the world wants mending ...

Come boys the world wants mending
let none sit down and rest
but set to work like heroes
and nobly do your best.:

Googling gets you to the Matrozenchor of Den Haag (The Hague), a chorus of apparently some renown. The quatrain seems to be a sort of motto, and is associated with the name Shakespeare in the Matrozenchor literature, but not knowing Dutch (unlike Hans van Haarst) I got no further. SS