"Let us find the famous Peter, then offer our congratulations," proposed Patience, with a searching glance at the company.
But the "famous Peter" was not to be found among the throng of gayly attired girls, and there was no little comment among them at his sudden and complete disappearance.
"I wonder what became of 'Peter Rabbit'?" remarked Anne, when, later in the evening, a number of Semper Fidelis girls gathered in one corner of the room to hold an informal session and compare notes.
"Who is 'Peter Rabbit'; or, the Mystery of the 'Blue Jacket'?" declaimed Emma Dean. "Even Sherlock is all at sea, aren't you, Brother Holmes?" Emma Dean laid her hand familiarly on the great investigator's shoulder.
"Don't be too sure that I'm all at sea. I have a theory." Elfreda put on a preternaturally wise expression.
"We'll hear it at once," returned Emma briskly.
"Not to-night. I have other weightier problems on my mind. I have been asked to solve the campus mystery."
"Campus mystery!" exclaimed several voices. "What is it?"
"Walk to the extreme northern end of the campus, then go east one hundred and fifty paces and you will come face to face with the problem," was Elfreda's mystifying answer.
"Oh, I know what you mean," cried Sara Emerson. "The ground has been broken there for some kind of building. We noticed it day before yesterday."