"I don't think he'll be back at least for
an hour."
"Is he at the Prince Edward Albert?" asked Craig.
"I don't know," returned the clerk, oblivious to the fact that we
must have seen that in order to know the telephone number he must
have known whether Mr. Whitney was there or elsewhere.
"I shall come in again," rejoined Kennedy, as we bowed ourselves
out. Then to me he added, "If he is with Senora de Moche and they
are at the Edward Albert, I think I can beat him back with this
letter if we hurry."
A few minutes later, in his laboratory, Kennedy set to work
quickly over an X-ray apparatus. As I watched him, I saw that he
had placed the letter in it.
"These are what are known as 'low tubes,'" he explained. "They
give out 'soft rays.'"
He continued to work for several minutes, then took the letter out
and handed it to me.
"Now, Walter," he said brusquely, "if you will just hurry back
down there to Whitney's office and replace that letter, I think I
will have something that will astonish you--though whether it will
have any bearing on the case remains to be seen. At least I can
postpone seeing Whitney himself for a while."
I made the trip down again as rapidly as I could.
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