At the fifth or sixth blow the pickaxe struck against an iron substance.

掘到第五下或是第六下时，鹤嘴锄碰到了一样铁东西。

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He again struck his pickaxe into the earth, and encountered the same resistance, but not the same sound. "It is a casket of wood bound with iron, " thought he.

他再把鹤嘴锄敲下去遇到了同样的抗拒力，但却是不同的声音，他想：“这是一只包了铁皮的木箱子。”

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