There does, however, appear to have been a "fishy composure" held sacred by the Greeks: this was the _Pompilus_, "Pompilus," says Apollonius Rhodius, "was originally a man, and he was changed into a fish on account of a love-affair of Apollo's. They say that Apollo fell in love with a beauty named Ocyrhoe, and that, when she had crossed over to Miletus, at the time of a festival, and was afraid to return lest the god should attack her, she induced Pompilus, a sailor, and friend to her father, to see her safely home; and that he led her down to the shore and embarked, when Apollo appeared, took the maiden, sunk the ship, and metamorphosed Pompilus into a fish." Others assert this fish to have sprung at the same time with Aphrodite, and from the same heavenly blood. What fish it was it is scarcely possible to say; but that there was a fish bearing this name held sacred by the Greeks is certain.
The Triton, in which the ancients believed as part of the physical world, was a different being from the deity. He was the classical Merman. The term _Nereïd_ was used confusedly to express the female of the Triton, or the Mermaid.
The passage, in his "Natural History," where Pliny speaks of the Triton, indicates that the existence of such an animal was not universally admitted. It is prefaced thus:--"The vulgar notion may very possibly be true, that whatever is produced in any other department of Nature may be found in the sea as well." We are then told that a deputation of persons from Olisipo, (the present Lisbon,) that had been sent for the purpose, brought word to the Emperor Tiberius that a Triton had been both seen and heard in a certain cavern, blowing a conch-shell, and that he was of the form in which Tritons are usually represented.
This is so simple and meagre as to read like an extract from some diary or annals; and the mere existence of such a passage seems to be good evidence that something, at the least, like a Triton, was certainly seen. For Pliny was sufficiently near to this time to know whether such a deputation had come to Rome, and would scarcely have volunteered a falsehood; so that the deputation may reasonably be granted. Then the distance from Lisbon to Rome was so great, particularly in that ante-railroad time, and the general interest in the Merman so little, that it does not seem possible a deputation should be sent that distance "for the purpose" only of presenting this information, unless the proof of the object seen was of the most convincing character to those by whom the deputation was sent.
