As sung by a barbershop quartet at Caltech, 1957:

By the light of the moon, of the silvery moon,
By the bright shining light, by the light of the moon,
If you want to go a-barbershopping, come along with me,
By the bright, shining light of the moon, of the moon.

Oh Mr Moon, Moon, bright and silvery moon,
Won't you please shine down on me?
Oh Mr Moon, Moon, bright and silvery moon,
Come from behind that tree.
My life's in danger, I've got to run:
Here comes a man with a big Gatling gun.
Oh Mr Moon, Moon, bright and silvery moon,
Won't you please shine down on me?