"After I received the first threat," explained Gennaro, "my wife and I went from our apartments at the hotel to her father's, the banker Cesare, you know, who lives on Fifth Avenue. I gave the letter to the Italian Squad of the police. The next morning my father-in-law's butler noticed something peculiar about the milk. He barely touched some of it to his tongue, and he has been violently ill ever since. I at once sent the milk to the laboratory of my friend Doctor Leslie to have it analyzed. This letter shows what the household escaped."
"My dear Gennaro," read Kennedy. "The milk submitted to us for examination on the 10th inst. has been carefully analyzed, and I beg to hand you herewith the result:
"Specific gravity 1.036 at 15 degrees Cent.
Water 84.60 per cent.
Casein 3.49 " "
Albumin 56 " "
Globulin 1.32 " "
Lactose 5.08 " "
Ash 72 " "
Fat 3.42 " "
Ricin 1.19 " "
"Ricin is a new and little-known poison derived from the shell of the castor-oil bean. Professor Ehrlich states that one gram of the pure poison will kill 1,500,000 guinea pigs. Ricin was lately isolated by Professor Robert, of Rostock, but is seldom found except in an impure state, though still very deadly. It surpasses strychnin, prussic acid, and other commonly known drugs. I congratulate you and yours on escaping and shall of course respect your wishes absolutely regarding keeping secret this attempt on your life. Believe me,
"Very sincerely yours,
"C.W. Leslie."
As Kennedy handed the letter back, he remarked significantly: "I can see very readily why you don't care to have the police figure in your case. It has got quite beyond ordinary police methods."
"And to-morrow, too, they are going to give another sign of their power," groaned Gennaro, sinking into the chair before his untasted food.
"You say you have left your hotel?" inquired Kennedy.