“That was really tough. I’ve had a lot of fun with my dad.
“But excuse me.” Once again Sally’s fingers gripped a knob and the mysterious radio set up a new sort of hum. With a headset clamped over her ears, she listened intently, then said in a low tone:
“Hello. Nancy! Are you there?”
Again she listened, then laughed low.
“I’m sorry, Nancy,” she apologized, speaking through a small mouthpiece. “Something terribly exciting happened. I got something on the shortest wave-length, where nothing’s supposed to be.
“Yes, I did!” she exclaimed. Then: “No! It can’t be! Fifteen minutes. Oh, boy! I’ll have to step on it. I—I’ll be right down. Meet you at the foot of the ladder.”
“What ladder?” the big girl asked in surprise.
“The one from first floor to second, of course. We don’t have stairways in this place, you know, only ladders.” Sally laughed low.
After turning off the switches, Sally snapped the black box shut, then hid it in a dark corner of the closet.
“But I just came up a stairway,” the new girl insisted.