"Where? When?" Isaac demanded.
"I saw him hanging around the house of my employer," Arnold said firmly, "under very suspicious circumstances. He was inquiring then for Mr. Rosario. It was the night before Rosario was murdered."
"What do you mean by that?" Isaac asked, hoarsely.
"You had better ask yourself what it means," Arnold replied. "For Ruth's sake, Isaac, don't have anything to do with that man. I don't know anything about him—I don't want to know anything about him. I simply beg you, for Ruth's sake, to keep out of trouble."
Isaac laughed harshly.
"You talk like a young fool!" he declared, turning on his heel.
CHAPTER XIV
SABATINI'S DOCTRINES
The apartments of Count Sabatini were situated in the somewhat unfamiliar quarter of Queen Anne's Gate. Arnold found his way there on foot, crossing Parliament Square in a slight drizzling rain, through which the figures of the passers-by assumed a somewhat phantasmal appearance. Around him was a glowing arc of lights, and, dimly visible beyond, shadowy glimpses of the river. He rang the bell with some hesitation at the house indicated by his directions—a large gray stone building, old-fashioned, and without any external signs of habitation. His summons, however, was answered almost immediately by a man-servant who took his hat and coat.