In Victorian towns, knocker-uppers tapped on bedroom windows to wake factory workers before dawn.

In the early industrial town, knocker-ups tapped on bedroom windows until dawn to make sure factory workers woke on time.

The editor's note explained that nigger-knocker is an alternative spelling of a racist slur and should never be used.

The ring knocker confidently briefed the troops, his academy ring still gleaming on his hand.

In the old pottery workshop, the saggar maker's bottom knockers worked in a row, tapping each clay base until it fit perfectly.

As it slunk through the alley, the cat's fur was black as Newgate's knocker.

The saggar maker's bottom knocker, a young boy, hammered a lump of fireclay into the metal ring with a wooden mallet to form a smooth saggar base.