[Alexander the Great] then conceived the stupendous idea of constructing a mole, which should at once connect [Tyre] with the main land; and this was actually accomplished by driving piles and pouring in incalculable quantities of soil and fragments of rock; and it is generally believed, partly on the authority of ancient authors, that the whole ruins of Old Tyre were absorbed in this vast enterprize, and buried in the depths of the sea …