"I saw them leaving the dining-room," he reported to us in the
laboratory directly afterward, "just as Whitney came in. They
could not see me. I took good care of that. But, say, there is a
change in Whitney, isn't there? I wonder what caused it?"
"It's as noticeable as that?" asked Kennedy. "And did she notice
it?"
"I'm sure of it," replied Norton confidently. "She couldn't help
it. Besides, after he left her and went into the dining-room
himself she and Alfonso seemed to be discussing something. I'm
sure it was that."
Kennedy said nothing, except to thank Norton and compliment him on
his powers of observation. Norton took the praise with evident
satisfaction, and after a moment excused himself, saying that he
had some work to do over in the Museum.
He had no sooner gone than Kennedy took from a drawer a little
packet of powder and an atomizer full of liquid, which he dropped
into his pocket.
"I think the Prince Edward Albert will be the scene of our
operations, to-night, Walter," he announced, reaching for his hat.
He seemed to be in a hurry and it was not many minutes before we
entered. As he passed the dining-room he glanced in. There was
Whitney, not half through a leisurely dinner.
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