In "Notes from a Small Island," Bill Bryson shares a humorous anecdote about the tenth Duke of Marlborough. While visiting his daughter's home, the duke expressed frustration when his toothbrush failed to foam properly. This incident revealed that his valet had always applied the toothpaste for him, leaving the duke oblivious to the fact that toothbrushes don't foam on their own.

This story illustrates not only the duke's amusing ignorance but also highlights the peculiar familiarity with luxury and servitude. Bryson uses this moment to reflect on the quirks of British nobility, making light of how such a distinguished figure could be so out of touch with everyday tasks.