They say that the Phoenicians who inhabit the city called Gades, when they sail outside the Pillars of Heracles under an easterly wind for four days, arrive at certain desolate places, full of rushes and seaweed, and that these places are not covered with water, whenever there is an ebb, but, whenever there is a flood, they are overflowed, and in these there is found an exceeding great number of tunnies, of a size and thickness surpassing belief, when they are stranded.