When Sir Charles Fosbrook was told by Mr. Pepys that Tangier had been surrendered to the Moors, he asked at once after the fate of his gigantic mole; and when he was informed that his mole had been, before the evacuation, so utterly blown to pieces that its scattered blocks made the harbour impossible for anchorage, he forbade so much as the mention in his presence of the name of Africa. But if he had done with Tangier, Tangier had not done with him, and five years afterwards he became concerned in the most unexpected way with certain tragic consequences of that desperate siege.

He received a letter from an acquaintance of whom he had long lost sight, a Mr. Mardale of the Quarry House near Leamington, imploring him to give his opinion upon some new inventions. The value of the inventions could be easily gauged; Mr. Mardale claimed to have invented a wheel of perpetual rotation. Sir Charles, however, had his impulses of kindness. He knew Mr. Mardale to be an old and gentle person, a little touched in the head perhaps, who with money enough to surfeit every instinct of pleasure, had preferred to live a shy secluded life, busily engaged either in the collection of curiosities or the invention of toy-like futile machines. There was a girl too whom Sir Charles remembered, a weird elfin creature with extraordinary black eyes and hair and a clear white face. Her one regret in those days had been that she was not born a horse, and she had lived in the stables, in as horse like a fashion as was possible. Her ankle indeed still must bear an unnecessary scar through the application of a fierce horse-liniment to a sprain. No doubt, however, she had long since changed her ambitions. Sir Charles calculated her age. Resilda Mardale must be twenty-five years old and a deuced fine woman into the bargain. Sir Charles took a glance at his figure in his cheval-glass. He had reached middle-age to be sure, but he had a leg that many a spindle-shanked youngster might envy, nor was there any unbecoming protuberance at his waist. He wrote a letter accepting the invitation and a week later in the dusk of a June evening, drove up the long avenue of trees to the terrace of the Quarry House.

The house was a solid square mansion built upon the side of a hill, and the ground in front of it fell away very quickly from the terrace to what Sir Charles imagined must be a pond, for a light mist hung at the bottom. On the other side of the pond the ground rose again in a steep hill. But Sir Charles had no opportunity at this moment to get any accurate knowledge of the house and its surroundings. For apart from the darkness, it was close upon supper-time and Miss Resilda Mardale must assuredly not be kept waiting. His valet subsequently declared that Sir Charles had seldom been so particular in the choice of his coat and small-clothes; and the supper-bell certainly rang out before he was satisfied with the set of his cravat.

He could not, however, consider his pains wasted when once he was set down opposite to Resilda. She was taller than he had expected her to be, but he did not count height a fault so long as there was grace to carry it off, and grace she had in plenty. Her face had gained in delicacy and lost nothing of its brilliancy, or of its remarkable clearness of complexion. Her hair too if it was less rebellious, and more neatly coiled, had retained its glory of profusion, and her big black eyes, though to be sure they were grown a trifle sedate, no doubt could sparkle as of old. Sir Charles set himself to make them sparkle. Old Mr. Mardale prattled of his inventions to his heart's delight—he described the wheel, and also a flying machine and besides the flying machine, an engine by which steam might be used to raise water to great altitudes. Sir Charles was ready from time to time with a polite, if not always an appropriate comment, and for the rest he paid compliments to Resilda. Still the eyes did not sparkle, indeed a pucker appeared and deepened on her forehead. Sir Charles accordingly redoubled his gallantries, he was slyly humorous about the horse-liniment, and thereupon came the remark which so surprised him and was the beginning of his strange discoveries. For Resilda suddenly leaned towards him and said frankly:

"I would much rather, Sir Charles, you told me something of your great mole at Tangier."

Sir Charles had reason for surprise. The world had long since forgotten his mole, if ever it had been concerned in it. Yet here was a girl whose thoughts might be expected to run on youths and ribands talking of it in a little village four miles from Leamington as though there were no topic more universal. Sir Charles Fosbrook answered her gravely.

"I thought never to speak of Tangier and the mole again. I spent many years upon the devising and construction of that great breakwater. It could have sheltered every ship of his Majesty's navy. It was wife and children to me. My heart lay very close to it. I fancied indeed my heart was disrupted with the disruption of the mole, and it has at all events, lain ever since as heavy as King Charles' Chest."

"Yes, I can understand that," said Resilda.

Sir Charles had vowed never to speak of the matter again. But he had kept his vow for five long years, and besides here was a girl of a remarkable beauty expressing sympathy and asking for information. Sir Charles broke his vow and talked, and the girl helped him. A suspicion that she might have primed herself with knowledge in view of his coming, vanished before the flame of her enthusiasm. She knew the history of its building almost as well as he did himself, and could even set him right in his dates. It was she who knew the exact day on which King Charles' Chest, that great block of mortised stones, which formed as it were the keystone of the breakwater, had been lowered into its place. Sir Charles abandoned all reserve, and talked freely of his hopes and fears as the pier ran farther out and out into the currents of the Straits, of his bitter disappointment when his labours were destroyed. He forgot his gallantries, he showed himself the man he was. Neither he nor Resilda noticed a low rumble of thunder or the beating of sudden rain upon the windows, so occupied were they with the theme of their talk; and at last Sir Charles, leaning back in his chair, cried out with astonishment and delight.

"But how is it that my mole is so familiar a thing to you? Explain it if you please! Never have I spent so agreeable an evening."