“I hope you understand it all,” Aline remarked. “I am not quite sure that I do,” said Audry. “Yes, I think it is quite clear; it’s very like the way the lid works on the old sword-kist.” “But we cannot get into the library and, even if we could,” said Audry, “the kist might be locked.” “Never mind that now; I expect that our room will come next,” said Aline. “Yes, listen to this:--‘In the topmost chamber a different device is adopted for greater safety by means of variety. If the ambry[6] nigh unto the door be opened it will be found that the shelf will pull forward an inch and a finger can be inserted behind it on the left hand side, and a small lever can be pushed backward. This enables the third plank near the newel-stair[7] wall to be lifted by pressing down the western end thereof, and a bolt may be found which, being withdrawn, one of the panels will fall somewhat and may be pushed right down by the hand. The newel-stair, though it appeareth not, is double and one may creep down thereby to the chamber itself.’” [6] A small cupboard made in the thickness of the wall. [7] A newel staircase is a spiral staircase circling round the newel, i.e., the centre shaft or post. The fact was,--that what appeared to be simply the under side of the steps, to any one going up the staircase, was really a second staircase, leaving a space of nearly three feet between the two. The children did not read further at that time, as they were eager at once to see if they could put their discovery to the test. Aline put down the book and went to the ambry and opened the door. The single shelf came forward without difficulty. “Have you found anything?” Audry asked eagerly. “Yes,” she replied, “but I cannot move it; it is too stiff.” “Let me have a try,” and Audry stepped forward and put her fingers into the space. “My hands are stronger than yours,” she said. “Ah, that is it!” she exclaimed, as she felt the lever move to one side, and by working it backwards and forwards she soon made it quite loose. [Illustration: The Moving Plank and the Way to the Secret Room.]