He took a small piece of parchment and shook a white powder into it from one of his medicine-jars. The jar was marked with the name of a mineral salt, of a nature to have been serviceable in case of sudden illness in the time of the Borgias. The Doctor folded the parchment carefully and marked the Latin name of the powder upon it.
"Here," he said, handing it to Mr. Bernard,—"you see what it is, and you know what service it can render. Keep these two protectors about your person day and night; they will not harm you, and you may want one or the other or both before you think of it."
Mr. Bernard thought it was very odd, and not very old-gentleman like, to be fitting him out for treason, stratagem, and spoils, in this way. There was no harm, however, in carrying a doctor's powder in his pocket, or in amusing himself with shooting at a mark, as he had often done before. If the old gentleman had these fancies, it was as well to humor him. So he thanked old Doctor Kittredge, and shook his hand warmly as he left him.
"The fellow's hand did not tremble, nor his color change," the Doctor said, as he watched him walking away. "He is one of the right sort."
CHAPTER XVI.
EPISTOLARY.
Mr. Langdon to the Professor.
MY DEAR PROFESSOR,—
You were kind enough to promise me that you would assist me in any professional or scientific investigations in which I might become engaged. I have of late become deeply interested in a class of subjects which present peculiar difficulty, and I must exercise the privilege of questioning you on some points upon which I desire information I cannot otherwise obtain. I would not trouble you, if I could find any person or books competent to enlighten me on some of these singular matters which have so excited me. The leading doctor here is a shrewd, sensible man, but not versed in the curiosities of medical literature.
I proceed, with your leave, to ask a considerable number of questions,—hoping to get answers to some of them, at least.