"Astonishing!" spoke another.
"There must be some trickery about it!" a little man in spectacles was heard to declare. "No fly could be taught to do such a thing."
"Fake!" cried the voice that had twice before shouted "rats."
Frank laughed as if amused.
"Wait," he said, quietly. "This is merely the beginning. What is to follow will astonish you still more. Back, Solomon."
Back to the unmarked square crept the huge fly.
"Some person call a letter, please, requested Frank.
"E," said a woman in the third row.
"E is the letter," said Frank. "Now, Solomon, find it."
The fly started to creep along the bottom of the mirror, hesitated, turned about, started back, stopped.