658 in this case

Did the Arabs murder him, after

Did the Arabs murder him, after all, just on the eve of his departure? Or, did he again turn the nose of his iron monster toward the inner world? Did he reach it, or lies he somewhere buried in the heart of the great crust? And if he did come again to Pellucidar was it to break through into the bottom of one of her great island seas, or among some savage race far, far from the land of his heart’s desire?

Edgar Rice Burroughs
At the Earth's Core

Does the answer lie somewhere upon

Does the answer lie somewhere upon the bosom of the broad Sahara, at the end of two tiny wires, hidden beneath a lost cairn? I wonder.

Edgar Rice Burroughs
At the Earth's Core