Sarah came on the following Saturday evening, and I showed her the plan we had made, and explained to her where we thought the entrance was, and how she was most likely to find the secret spring.

Sarah was much pleased with the success which had so far attended her efforts, and promised to find the spring if it existed. She said she would get up half an hour before the other servants, and try every knob and roughness on or near the grate.

However, week after week rolled on, and every Saturday came a message, "No result;" and the week before Christmas she sent to say she had tried every possible place, but could not find any signs of it. I sent back in answer to ask her to try all the stones and bricks as far up the chimney as she could reach.

With Christmas, Polly came home from school, and this time to stop for good, for papa could not very well afford to keep her at so expensive a school as Grendon House; and indeed we wanted her bright face and happy laugh back again among us. Papa's practice was not very lucrative; it was a large, but not a good-paying one. A great proportion of it lay among the lower classes; in any serious cases among them he was always ready to give his time and skill. Indeed for the last three years, since there was an apparent certainty that we should be all so handsomely provided for, papa had purposely given up much of his paying practice. Many among the upper classes have the habit of calling in a medical man on the slightest pretext, and like him, indeed, to call regularly, and have an hour's chat on all sorts of subjects; this time papa could not spare, and indeed I know that he said to two or three of his very best patients,—

"You have nothing serious the matter with you. All you want is a little occasional medicine, and a good chat of a day to do you good and cheer you up; this I have no time to give you, when I have half a dozen dying people waiting anxiously for me. Send to Harper; he is a clever fellow; knows all about everything; will amuse you more than I do. He has a large family, and your money will be of use to him. If you get seriously ill, and want me, I will of course come to you."

So papa had gradually withdrawn himself from much of his paying practice; he had still an income sufficient to keep us comfortably, but it was not nearly what it had been four or five years before. However, he was quite content to work as he did, giving his skill and time to those who most required but were least able to pay for them.

Harry came home, too, a little before Christmas. He had finished his last piece of work, and had now obtained an appointment of £150 a year to superintend a railway in the course of construction in the north of Ireland.

The evening after Christmas Day I received a note from Sarah, saying, that that morning, she had, in feeling up the chimney, found a projecting knob immediately behind the mantelpiece; that on pressing this it went into the wall, and that every time it did so, she could hear a click, but that she could not find that anything else moved.

"Hurrah, Sarah!" Harry shouted when I read the note aloud; "we are on the right track. 'The king shall enjoy his own again!'" he sang in his stentorian way.

"I really do begin to think we are on the track," papa said. "You must tell Sarah that no doubt there is some other spring which must be pressed either together or before or after this; for generally there were two springs to these old hiding-places, in case one should be touched accidentally."