Smith's Bible Dictionary
Quicksands, The. More properly, Syrtis, The Acts 27:17. The broad and deep bight on the north African coast, between Carthage and Cyrene. There were properly two Syrtes - the eastern or larger, now called the Gulf of Sidra, and the western or smaller, now the Gulf of Cabes. It is the former to which our attention is directed, in this passage of the Acts.
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Smith, William, Dr. Entry for 'Quicksands The'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/q/quicksands-the.html. 1901.