"'Tis a letter."
"A letter! Where is it?"
Billy related the circumstances of the discovery of the letter. Then he said:
"'Tis a sealed letter. I wants t' show it t' Doctor Luke."
"He's not back."
"Not back? That's queer!"
"Oh, no," said Archie, easily; "the case has turned out to be more serious than he thought and has detained him. Where's the letter?"
Billy gave the letter to Archie.
"Bread-and-Butter," Archie read. "No other address. That is queer. What shall we do about it?"