"Did he use the hypodermic syringe himself?" asked Nick.
"No, sir."
"Who gave him the injections?"
"Dr. Lord."
"Was Dr. Lord here on the evening preceding his death?"
"Yes; he had dinner here that evening."
"Then he is a friend of the family?"
"Yes, sir. He is engaged to be married to my sister."
Nick’s face brightened; but he pretended not to notice the announcement which young Rogers had just made.
Continuing, he said: