the murderer."

"Why do you think that?" cried Strahan, startled from the drowsiness
that was creeping over him.

"Because the manuscript may show that Sir Philip had some enemy, and who
but an enemy could have had a motive for such a crime? Come, bring forth
the book. You of all men are bound to be alert in every research
that may guide the retribution of justice to the assassin of your
benefactor."

"Yes, yes. I will offer a reward of L5,000 for the discovery. Allen,
that wretched old steward had the insolence to tell me that I was the
only man in the world who could have an interest in the death of his
master; and he looked at me as if he thought that I had committed
the crime. You are right; it becomes me, of all men, to be alert. The
assassin must be found. He must hang."

While thus speaking, Strahan had risen, unlocked a desk, which stood on
one of the safes, and drawn forth a thick volume, the contents of which
were protected by a clasp and lock. Strahan proceeded to open this lock
by one of a bunch of keys, which he said had been found on Sir Philip's
person.

"There, Allen, this is the memoir. I need not tell you what store I
place on it,--not, between you and me, that I expect it will warrant
poor Sir Philip's high opinion of his own scientific discoveries; that
part of his letter seems to me very queer, and very flighty. But he
evidently set his heart on the publication of his work, in part if
not in whole; and, naturally, I must desire to comply with a wish so
distinctly intimated by one to whom I owe so much. I be, you, therefore,
not to be too fastidious. Some valuable hints in medicine, I have reason
to believe, the manuscript will contain, and those may help you in your
profession, Allen."

"You have reason to believe! Why?"

"Oh, a charming young fellow, who, with most of the other gentry
resident at L----, called on me at my hotel, told me that he had
travelled in the East, and had there heard much of Sir Philip's
knowledge of chemistry, and the cures it had enabled him to perform."

"You speak of Mr. Margrave. He called on you?"

"Yes."

"You did not, I trust, mention to him the existence of Sir Philip's
manuscript."

"Indeed I did; and I said you had promised to examine it. He seemed
delighted at that, and spoke most highly of your peculiar fitness for
the task."

"Give me the manuscript," said I, abruptly, "and after I have looked at
it to-night, I may have something to say to you