How does the “auger hole, bored about half an inch or so, into the plank” develop the symbol of Ahab’s whalebone leg?

The hole is where Ahab braces his whalebone leg against the deck, giving him a steady stance as he pursues the whale. This detail links the leg to his determination and relentless commitment to revenge against Moby Dick. It does not suggest boredom or a special bond with the whale; the wood is damaged by the leg, but that damage mainly emphasizes Ahab’s forceful purpose.

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