Presently there was a sound of footsteps on the gymnasium roof and they heard Miriam's voice saying: "They must have escaped through the trap-door in the laboratory and come along here.

Wait a minute, girls, and I'll see." "O Grace, we're caught!" groaned Jessica.

"What shall we do ?" "No we aren't yet," answered Grace.

"Especially if she is coming alone, and that is what I am praying for." "I'll come with you, Miriam," called the voice of the sophomore leader.
"Why don't you take the other side ?" proposed Miriam.

"And I'll go around and meet you." "Very well," came the answer.
The freshmen clutched each other and waited.
Miriam ran lightly along the roof, and came upon the seven prostrate figures so suddenly that she almost lost her balance.
"Don't speak," said Grace, in a distinct whisper, "and don't give us away.