"Some of the girls saw their feet," said her informant, "and not only their feet but their trousers, too."
The teacher rose and rapped sharply for order.
"Young ladies," she called in a loud voice, "I am sorry to disturb the dancers, but we have every reason to believe there are some men in the room. Since it is not yet time for you to unmask, it will be simple to find out who does not belong here by having you file past me. I will lift each mask myself."
The dancers accordingly arranged themselves in a long line and walked single file past the teacher. She saw only girl's faces, however, as she peeped under the masks, and the dance proceeded.
The next disturbance came when the maskers had all taken their stand at one end of the room at the request of the six dominoes, who managed to whisper to each sophomore that there was presently to be a surprise.
An expectant hush fell over the company as the six dominoes filed out of a side room and stood, for a moment, in full view of the sophomores. Then the six deliberately lifted their dominoes, disclosing trouser legs and men's shoes. Instantly the place was in pandemonium; yet before the sophomores could rush upon the intruders six long horns were blown in unison, and immediately the lights went out. In the darkness the six dominoes made for the stairs, rushed along the gallery, and were admitted to the laboratory by the duplicate key. But, just before the blue domino disappeared, she called out in a loud voice from the gallery:
"The freshmen are avenged!"
When the doors were safely closed the lights were turned on again, disclosing the sophomores blinking foolishly at each other after the sudden startling change from darkness to light.
"They are in the laboratory!" cried one. "Let's cut off their escape!"
The angry sophomores made a rush for the door.