What further comment Nan may have made cannot even be guessed, for at that moment there was a noise at one of the windows; some one was trying to raise the sash. Nan and Tasma Tid held their breath while they listened, and then, when they were sure that some one was preparing to enter the building, the African closed the closet door noiselessly, and pulled Nan after her to the narrowest and most uncomfortable part of the musty and dusty place--the space next the stairway, where it was so low that they were compelled to sit flat on the floor. The intruder, whoever he might be, crawled cautiously through the window--they could hear the buttons of his coat strike against the sill--and leaped lightly to the floor. He lowered the window again, and then, after tiptoeing about among the benches, came straight to the closet. As Tasma Tid had not taken time to fasten it on the inside, the door was easily opened. Dark as it was, Nan and the African could see that the intruder was a man, but, beyond this, they could distinguish nothing. Nan and her companion would have breathed freer if recognition had been possible, for the new-comer was Gabriel, who had determined to take this method of discovering the aim and object of the Union League. Once in the closet, Gabriel took pains to make the inside fastenings secure. It was one of the whims of Mr. McManus, the school-master, who had so often caused Gabriel's head and the blackboard to meet, that the fastenings of this closet should be upon the inside. It tickled his humour to feel that a refractory boy should be his own jailer, able, and yet not daring, to release himself until the master should rap sharply on the door. Gabriel was less familiar with these fastenings than he had formerly been, and he fumbled about in the dark for some moments before he could adjust them to his satisfaction. He made no effort to explore the closet, taking for granted that it could have no other occupant. This was fortunate for Nan, for if he had moved about to any extent, he would inevitably have stumbled over the African and her young mistress, who were crouched and huddled as far under the stairway as they could get. Gabriel stood still a moment, as if listening, and then he sat flat on the floor, and stretched out his legs with a sigh of relief. After that there was a long period of silence, during which Nan had a fine opportunity to be very sorry that she had ever ventured out on such a fool's errand. "If I get out of this scrape," she thought over and over again, "I'll never be a tomboy; I'll never be a harum-scarum girl any more." She had no physical fear, but she realised that she was placed in a very awkward position.