"After all I am right," says John, with the air of a man who attempts to
justify himself.

At that the English girl laughs scornfully.

"Really, I did not think men could be so easily deceived, and one whom
I considered as shrewd as you, Doctor Chicago. See what a miserable
deception, a fraud transferred from the boards of a New York theater to
Algiers. Behold! the magic wand touches age with a gentle touch, and
what follows?"

Lady Ruth is standing between the two, and within arm's length of
either.

The Sister has not moved, but, as if confident of influencing John,
holds her own. She shoots daggers with her eyes at the English girl,
but looks cannot hurt.

As Lady Ruth utters her last words, she makes a sudden move.

With a dexterous fling of an arm she succeeds in tearing from the
Sister's face the cleverly-made thin stage mask that was contrived to
conceal the features of one who did a double act.

The professor laughs.

From the crowd that is still gathering various sounds arise, for no one
can even give a guess as to the nature of the peculiar trick which is
thus being enacted.