The man raised his head again, as though to make certain that his eyes had not deceived him, and as he did so I caught a glance of the girl’s white countenance in the wind-blown light of the street-lamp.

Never, to my last day, shall I forget the terrible expression of blank despair in those wonderful eyes. All light and life had died out of her fair face. She looked as though her young heart had, at the sight of that fateful sign, been frozen by some nameless terror.

I had seen plays in which a woman’s despair was depicted, but never had I witnessed real despair until that moment. Hideous is the only word that describes it.

At the end of the short thoroughfare they turned and walked back past the house, feigning, however, not to notice the lighted window. The instant I had overheard these strange ejaculations I crossed the road and hurried on round the corner out of sight, in order that they should not detect me following them; but, watching their return, I turned again and went after them into Theobald’s Road.

On through the rain they trudged in the direction of Oxford Street, wet to the skin, for the down-pour still continued without cessation, and the pavements shone beneath the gaslights. Neither tram-cars nor cabs attracted them, for it seemed more than likely that their extreme poverty did not allow them the luxury of a conveyance.

The girl’s hand was held to her breast as she walked, as though to stay the fierce beating of her heart, but her companion strode on steadily with fixed purpose and deep-knit brows.

I had been loath to relinquish my vigil before that silent house, fearing that the little old woman who had entered there might emerge again and carry my precious Arnoldus with her. Yet, on the other hand, this strange pair, who had come there in secret and read the signal, deeply interested me, and my curiosity impelled me to follow them.

The loud, ear-piercing runs of a street-piano suddenly recalled to my mind the pair of Italians I had noticed ten minutes before; and as we passed them playing before another public-house near Southampton Row I halted for a moment, stepped aside, and spoke to the beetle-browed young Tuscan in his own tongue.

“Listen. I want you to assist me,” I exclaimed quickly. “There’s no time to lose, and you’ll get half a sovereign if you do as I direct. Go back alone to Harpur Street—that short turning you came up ten minutes ago—and watch a house with a stuffed bear in the upper window—Number 106. If anyone comes out, follow her—especially a little old woman. Wait there till I rejoin you. Will you do it?”

“Certainly, signore,” was the young fellow’s prompt reply. “Number 106, you say? Very well, trust me. My mother, here, can hire somebody to help her home with the organino.”