Not one of the row connected-in with the magnetized plates was lit, either, and yet no living person should have walked or crept or climbed away through door, window, coal-chute or other exit without getting caught. But Roger did not pause. He ran to Tip’s room.

Tip, tied tightly to a bedpost, his lips taped shut, his eyes rolling as he sweated in his frantic effort to escape, saw him.

Roger first took the tape off as gently as haste allowed.

Just as soon as he was able to speak, Tip gasped:

“Tell Grover them mouses ain’t is.”

“Ain’t is?——”

He knew that Potts used queer phrases, trying to fit big words in, and this might be his way of leading up to some puzzling declaration.

“What happened? Stop being smart, and tell me!” ordered Roger.

“If mouses is here, you say they is here?”

“Well?——”