Origen

“ The natives surround with nets a large circle of the shore, and dive down, exerting themselves to seize that one of them all which is the leader; for they say that, when this one is captured, the catching of the troop subject to it costs no trouble, as not one of those in the troop remains stationary, but as if bound by a thong follows the leader of the troop. ”

“ There are many merchants engaged in many forms of merchandise, but not to any one of these is the kingdom of heaven like, but only to him who is seeking goodly pearls, and has found one equal in value to many, a very costly pearl which he has bought in place of many. ”

“ The next best pearls are those taken from the sea at Britain; and those of the third quality, which are inferior not only to the first but to the second, are those found at Bosporus off Scythia. Concerning the Indian pearl these things further are said. They are found in mussels, like in nature to very large spiral snail-shells; and these are described as in troops making the sea their pasture-ground, as if under the guidance of some leader, conspicuous in colour and size, and different from those under him, so that he has an analogous position to what is called the queen of the bees. ”