"Oh, Dick, it's serious!" Betty said, crossly. "Dot Mead called up the caterer and he said it had been delivered," she explained to Polly.

"A tragedy!" Bob exclaimed. "I must have sherbet; the party will be ruined without it."

"Of course it will," Betty answered; "you can't do just with chicken salad. It's got to be found. You go that way and we'll go this. Look at every door, and perhaps we'll find it."

They started in opposite directions, but when they met outside of the Assembly Hall a few minutes later the sherbet was still missing.

"I'm going to tell Mrs. Baird," Betty said; "maybe she can suggest something to do. Dick, you wait here with Polly and Bob. I'll be right back."

And she disappeared through the window.

"Do you suppose," Polly said, suddenly—"I have an idea. Come with me, both of you." She ran down the road, regardless of satin slippers, as far as the gym. "They may have left it here by mistake," she said to the boys.

Bob ran to the door. "Here it is!" he exclaimed. He pointed to the six buckets packed full of ice.

"What will we do with it?" Dick inquired. "Carry it back to Betty?"

"No; we'll unpack it here—ugh! The ice is all slushy." She stood back to save her dress.