... then I don't knowwhat I'd do."They were in the library of the Swift home that evening. Tom, Ned,Mr. Damon and the aged inventor, and of course the only thing talked of was the ... writes," said the lad, again referring to the letter, "thatsomewhere near the beginning of the tunnel that leads into the city of gold, there is an immense flat plain, on which the ancient ... to the caves of ice in search of treasure, and howhis airship was wrecked is told in the eighth volume of the series, and in the next is related the details of his swift sky- racer, in which...