'Hammer away,' replied the earl, approaching me with his usual good-natured, jocular expression.

'I eliminate the safe from our investigations because it was purchased thirteen years ago, but the buying of the book, of wall covering, of this tough paper from France, all group themselves into a set of incidents occurring within the same month as the purchase of the anvil and the building of the forge; therefore, I think they are related to one another. Here are some sheets of paper he got from Budge Row. Have you ever seen anything like it? Try to tear this sample.'

'It's reasonably tough,' admitted his lordship, fruitlessly endeavouring to rip it apart.

'Yes. It was made in France, and is used in gold beating. Your uncle beat his sovereigns into gold-leaf. You will find that the book from Denny's is a volume on gold beating, and now as I remember that scribbled word which I could not make out, I think the title of the volume is "Metallurgy". It contains, no doubt, a chapter on the manufacture of gold-leaf.'

'I believe you,' said the earl; 'but I don't see that the discovery sets us any further forward. We're now looking for gold-leaf instead of sovereigns.'

'Let's examine this wallpaper,' said I.

I placed my knife under a corner of it at the floor, and quite easily ripped off a large section. As Higgins had said, the brown paper was on top, and the coarse, light-coloured paper underneath. But even that came away from the oak panelling as easily as though it hung there from habit, and not because of paste.

'Feel the weight of that,' I cried, handing him the sheet I had torn from the wall.

'By Jove!' said the earl, in a voice almost of awe.

I took it from him, and laid it, face downwards, on the wooden table, threw a little water on the back, and with a knife scraped away the porous white paper. Instantly there gleamed up at us the baleful yellow of the gold. I shrugged my shoulders and spread out my hands. The Earl of Chizelrigg laughed aloud and very heartily.