of secretive snails  
in Tyre the precious purple  
Phoenicia made

(see: https://en.wikipedia.org/wiki/Tyrian_purple)

(image: By http://de.wikipedia.org/w/index.php?title=Diskussion:Purpur_%28Farbstoff%29 [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)%5D, via Wikimedia Commons)

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