"What do you propose to do about this—impostor?" she demanded. "You are the person chiefly responsible. You permitted Mrs. Witherbee to receive him."
"Why don't you expose him?" asked Polly meekly.
Rosalind ignored the inquiry.
"Besides," added Polly, "he says he will go away to-morrow."
"He will not!" exclaimed Rosalind.
"You mean—"
"I mean that he will not leave this island until we know something about him if I have to sit up by myself and watch him."
Polly uttered an exclamation of awe.
"The man's an impostor—probably a thief," added Rosalind. "Do you suppose I shall permit him to go as he came? I think not!"
"You think we ought to tell the others?"