"'It is a chelengk,' said Jack with some complacency. 'Ain't I elegant?'
'Wind it up again. Wind it up for him,' said his friends, and the Captain set his hat, his best, gold-laced, number one full-dress scraper, on the table: the splendidbauble — two close-packed lines of small diamonds, each topped by a respectable stone and each four or five inches long — had a round, diamond-studded base; this he twisted anti-clockwise for several turns, and as he put on his head again the chelengk sprang into motion, the round turning with a gentle whirr and the sprays quivering with a life of their own, so that Captain Aubrey sat in a small private coruscation, a confidential prismaticfirework display, astonishingly brilliant in the sun." —Patrick O'Brian, Treason's Harbour, 13–14