Mr Asterias was accompanied by his son, to whom he had given the name of Aquarius--flattering himself that he would, in the process of time, become a constellation among the stars of ichthyological science. What charitable female had lent him the mould in which this son was cast, no one pretended to know; and, as he never dropped the most distant allusion to Aquarius's mother, some of the wags of London maintained that he had received the favours of a mermaid, and that the scientific perquisitions which kept him always prowling about the sea-shore, were directed by the less philosophical motive of regaining his lost love.
Mr Asterias perlustrated the sea-coast for several days, and reaped disappointment, but not despair. One night, shortly after his arrival, he was sitting in one of the windows of the library, looking towards the sea, when his attention was attracted by a figure which was moving near the edge of the surf, and which was dimly visible through the moonless summer night. Its motions were irregular, like those of a person in a state of indecision. It had extremely long hair, which floated in the wind. Whatever else it might be, it certainly was not a fisherman. It might be a lady; but it was neither Mrs Hilary nor Miss O'Carroll, for they were both in the library. It might be one of the female servants; but it had too much grace, and too striking an air of habitual liberty, to render it probable. Besides, what should one of the female servants be doing there at this hour, moving to and fro, as it seemed, without any visible purpose? It could scarcely be a stranger; for Claydyke, the nearest village, was ten miles distant; and what female would come ten miles across the fens, for no purpose but to hover over the surf under the walls of Nightmare Abbey? Might it not be a mermaid? It was possibly a mermaid. It was probably a mermaid. It was very probably a mermaid. Nay, what else could it be but a mermaid? It certainly was a mermaid. Mr Asterias stole out of the library on tiptoe, with his finger on his lips, having beckoned Aquarius to follow him.
The rest of the party was in great surprise at Mr Asterias's movement, and some of them approached the window to see if the locality would tend to elucidate the mystery. Presently they saw him and Aquarius cautiously stealing along on the other side of the moat, but they saw nothing more; and Mr Asterias returning, told them, with accents of great disappointment, that he had had a glimpse of a mermaid, but she had eluded him in the darkness, and was gone, he presumed, to sup with some enamoured triton, in a submarine grotto.