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clear. The hole which he had uncovered was the mouth of an old well: one of those pernicious wells which have no protective coping but of which the opening, flush with the surface of the ground, is ordinarily closed by a hinged flap. The rotten timber that he had struck was part of this flap, and he could now see the rusty remains of the hinges. When the well had gone out of use, some one, with incredible folly, had simply covered it up by heaping earth on the closed flap.

      Mr. Pottermack, having made these observations, proceeded methodically to clear away the soil until the entire mouth of the well was exposed. Then, going down on hands and knees, he approached, and cautiously advancing his head over the edge, peered down into the dark cavity. It was not quite dark, however, for though the slimy brick cylinder faded after a few feet into profound gloom, Mr. Pottermack could see, far down, as it seemed in the very bowels of the earth, a little circular spot of light on which was the dark silhouette of a tiny head. He picked up a pebble, and, holding it at the centre of the opening, let it drop. After a brief interval the bright spot grew suddenly dim and the little head vanished: and after another brief interval there came up to his ear a hollow “plop” followed by a faint, sepulchral splash.

      There was, then, water in the well; not that it mattered to him, as he was going to cover it up again. But he was a man with a healthy curiosity and he felt that he would like to know all about this well before he once more consigned it to oblivion. Walking across to the workshop, he entered the metalwork section and cast his eye around for a suitable sinker. Presently, in the “oddments” drawer, he found a big iron clock-weight. It was heavier than was necessary, but he took it in default of anything more suitable, and going back to the well, he tied it to one end of the measuring-cord. The latter, being already marked in fathoms by means of a series of knots, required no further preparation. Lying full-length by the brink of the well, Mr. Pottermack dropped the weight over and let the cord slip through his hands, counting the knots as it ran out and moving it up and down as the weight neared the water.

      The hollow splash for which he was listening came to his ear when the hand that grasped the cord was between the fourth and fifth knots. The depth, therefore, of the well to the surface of the water was about twenty-seven feet. He made a mental note of the number and then let the cord slip more rapidly through his hands. It was just after the seventh knot had passed that the tension of the cord suddenly relaxed, telling him that the weight now rested on the bottom. This gave a depth of sixteen feet of water and a total depth of about forty-three feet. And to think that, but for the merest chance, he would now have been down there where the clock-weight was resting!

      With a slight shudder he rose, and, hauling up the cord, coiled it neatly and laid it down, with the weight still attached, a few feet away on the cleared ground. The question that he now had to settle was how far the existence of the well would interfere with the placing of the sun-dial. It did not seem to him that it interfered at all. On the contrary; the well had to be securely covered up in any case, and the sun-dial on top of the covering would make it safe for ever. For it happened that the position of the well coincided within a foot with the chosen site of the dial; which seemed quite an odd coincidence until one remembered that the position of both had probably been determined by identical sets of measurements, based on the ground-plan of the garden.

      One thing, however, was obvious. Mr. Gallett would have to be informed of the discovery without delay, for something different from me proposed brickwork foundation would be required. Accordingly, Mr. Pottermack slipped on his coat, and, having sought out a hurdle and laid it over the well—for you can’t be too careful in such a case—set off without delay for the mason’s yard. As he opened the front door, he observed the letter still lying in the wire basket under the letter-slit. But he did not take it out. It could wait until he came back.

      Mr. Gallett was deeply interested, but he was also a little regretful. The altered arrangements would cause delay and increase the cost of the job. He would want two biggish slabs of stone, which would take some time to prepare.

      “But why cover the well at all?” said he. “A good well with sixteen feet of water in it is not to be sneezed at if you gets a hard frost and all the pipes is bunged up and busted.”

      But Mr. Pottermack shook his head. Like most town-bred men, he had rather a dislike to wells, and his own recent narrow escape had done nothing to diminish his prejudice. He would have no open well in his garden.

      “The only question is,” he concluded, “whether the sun-dial will be safe right over the well. Will a stone slab bear the weight?”

      “Lor’ bless you,” replied Gallett, “a good thick slab of flagstone would bear St. Paul’s Cathedral. And we are going to put two, one on top of the other to form a step; and the base of the dial itself a good two foot wide. It will be as strong as a house.”

      “And when do you think you’ll be able to fix it?”

      Mr. Gallett reflected. “Let’s see. Today’s Toos-day. It will take a full day to get them two slabs sawn off the block and trimmed to shape. Shall we say Friday?”

      “Friday will do perfectly. There is really no hurry, though I shall be glad to get the well covered and made safe. But don’t put yourself out.”

      Mr. Gallett promised that he would not, and Pottermack then departed homeward to resume his labours.

      As he re-entered his house, he picked the letter out of the letter-cage, and, holding it unopened in his hand, walked through to the garden. Emerging into the open air, he turned the letter over and glanced at the address; and in an instant a most remarkable change came over him. The quiet gaiety faded from his face and he stopped dead, gazing at the superscription with a frown of angry apprehension. Tearing open the envelope, he drew out the letter, unfolded it and glanced quickly through the contents. Apparently it was quite short, for, almost immediately, he refolded it, returned it to its envelope and slipped the latter into his pocket.

      Passing through into the walled garden, he took off his coat, laid it down in the summer-house and fell to work on the excavation, extending the circle into a square and levelling the space around the well to make a bed for the stone slab. But all his enthusiasm had evaporated. He worked steadily and with care; but his usually cheerful face was gloomy and stern, and a certain faraway look in his eyes hinted that his thoughts were not on what he was doing but on something suggested by the ill-omened missive.

      When the light failed, he replaced the hurdle, cleaned and put away the spade, and then went indoors with his coat on his arm to wash and take his solitary supper; of which he made short work, eating and drinking mechanically and gazing before him with gloomy preoccupation. Supper being finished and cleared away, he called for a kettle of boiling water and a basin, and, taking from a cupboard a handled needle, a pair of fine forceps, and a sheet of blotting-paper, laid them on the table with Mrs. Bellard’s tin box. The latter he opened and very carefully transferred the imprisoned snails to the basin, which he then filled with boiling water; whereupon the unfortunate molluscs each emitted a stream of bubbles and shrank instantly into the recesses of its shell.

      Having deposited the kettle in the fireplace, Mr. Pottermack drew a chair up to the table and seated himself with the basin before him and the blotting-paper at his right hand. But before beginning his work he drew forth the letter, straightened it out and, laying it on the table, read it through slowly. It bore no address and no signature; and though the envelope was addressed to Marcus Pottermack, Esq., it began, oddly enough, “Dear Jeff.”

      “I send you this little billy doo,” it ran on, “with deep regret, which I know you will share. But it can’t be helped. I had hoped that the last one would be in fact, the last one, whereas it turns out to have been the last but one. This is positively my final effort, so keep up your pecker. And it is only a small affair this time. A hundred—in notes, of course. Fivers are safest. I shall call at the usual place on Wednesday at 8 P.M. (‘in the gloaming, O! my darling!’) This will give you time to hop up to town in the morning to collect the rhino. And mind I’ve got to have it. No need to dwell on unpleasant alternatives. Necessity knows no law. I am in a devil of a tight corner and you have got to help me out. So adieu until Wednesday evening.”

      Mr. Pottermack turned from the letter, and, taking