She flew down the stairs, found the basket and returned with it to the attic. Then she sat down before the brass-studded box and began trying one key after another in the curious old lock. Some were too large, but most were too small. One would go into the lock but would not turn; another stuck so fast that she feared for a time that she would never get it out again. But at last, when the basket was almost empty, an oddly-shaped, ancient brass key slipped easily into the lock. With a cry of joy Martha turned the key with both hands; then she heard a sharp “click,” and the next moment the heavy lid flew up of its own accord!