"'Put up your ill-gotten gains,' said I, much provoked. 'I'll wait over a steamer and see what I can do because I like your affection for your brother.'
"He grinned again. I got out my microscope and went ashore with him, to find that he was correct. The cripple's blood swarmed with the malarial organisms, but we managed to overcome them. When I came to leave he was quite out of danger.
"It was about six months later that I was in a little hotel in New York much frequented by people from south of the tropic, when who should come in but Rosenthal. I saw immediately that he was in trouble. His big, swarthy, Satanic face was seamed and lined and his shaggy black eyebrows almost hid his fierce green eyes.
"'Bon jour, Dr. Leyden,' said he, roughly. 'I heard that you were here and have come to engage your services.'
"'Indeed?' said I.
" 'But yes—it is Jacob again. Ah, mon
[ 125 ]
