He dozed off for some time, and, all of a sudden, he was awakened by hearing something going "thumpity-thump-bump-bump-bump!

Then the bump elongates and up rolls an immense blue-grey or blackish grey round back with a faint ridge along the top, on which presently appears a small hook-like dorsal fin, and then the whole sinks and disappears.

Just as the Commodore made a nice, soft-bump landing at the pier, a man informed him that the gasoline had been carried to the Adventist's mill by mistake.

I remember at Oxford he used to take all his clothes off on bump-supper nights and ride around the quad, singing comic songs.