"I haven't thought of that," Venner muttered. "On the whole, it would be exceedingly injudicious not to extinguish all the lights. We had better go on at once, I think, and get it over."
The house was reduced to darkness, and very quietly and cautiously the two adventurers crept through the panel. They were in the hall on the other side, of which fact there was no doubt, for they stepped at once off a marble floor on to a thick rug which deadened the sound of their footsteps. They had, naturally enough, expected to find the whole place in darkness, and the tenant of the house and his servants in bed. This, on the whole, would be in their favor, for it would enable them to take all the observations they required with a minimum chance of being disturbed.
A surprise awaited them from the first. True, the hall was in darkness, and, as far as they could judge, so was the rest of the house. But from somewhere upstairs came the unmistakable sound of a piano, and of somebody singing in a sweet but plaintive soprano voice. Gurdon clutched his companion by the arm.
"Don't you think it is just possible that we have made a mistake?" he whispered. "Isn't it quite on the cards that this is a genuine affair, and that we are intruding in an unwarrantable manner upon some respectable private citizen? I am bound to say that that beautiful voice does not suggest crime to me."
"We must go on now," Venner said, impatiently. "It won't do to judge by appearances. Let us go up the stairs and see what is going on for ourselves. If we are intruding, we will get away as speedily as possible."
Gurdon made no further objection, and together they crept up the stairs. There was no chance of their being surprised from behind by the servants, for they had taken good care to notice that the basement was all in darkness. They were getting nearer and nearer now to the sound of the music, which appeared to come from the drawing-room, the door of which was widely enough open for the brilliant light inside to illuminate the staircase. A moment later the music ceased, and someone was heard to applaud in a hoarse voice.
"Sing some more," the voice said. "Now don't be foolish, don't begin to cry again. Confound the girl, she makes me miserable."
"Do you recognise the voice?" Venner whispered.
"Lord! yes," was Gurdon's reply. "Why, it's Fenwick. No mistaking those tones anywhere. Now, what on earth does all this mean?"
"We shall find out presently," Venner said. "You may laugh at me, but I quite expected something of this kind, which was one of the reasons why I obtained the keys of the house."