'Yet those two men were hunting just now for the cellar door that led to it.'

'So they were.'

Marjorie sat silent, thinking the problem out. Alan did not interrupt her, so great was his faith in his sister. She often hit on the right clue when they were puzzled over things, and he felt that, even if she could not do so in the present case, it would be a great comfort to be able to talk over each new discovery with her, and have her help when he needed it.

'One thing struck me,' said Marjorie at last. 'When there was that fuss about the summer-house door being open, do you remember how anxious Thomas was to get in? Did you see what a cross look he had all the time Peet was speaking? It was just as if he hated Peet. I wonder if he wants to do him some injury?'

'Hu-um,' pondered Alan, taking in the new idea slowly; 'no one can like that surly old Peet, but doing him an injury is another thing. I expect you have the right end of the thread, but what is it going to lead to? Has Peet anything valuable in the ruin? And if he has—and it seems as if he must have—how can I find out what it is, or where it is? I dislike him, in spite of Aunt Betty calling him a rough diamond; but of course I wouldn't see him robbed or cheated.'

'I should think not, nor anybody else either. But what do you think we ought to do? Why not tell Father about it, and ask him to keep the secret till something turns up? He would find out at once what Peet has in the summer-house.'

But Alan, always inclined to be rather selfish and wilful, thought this would spoil the fun of discovering it themselves, and would not listen to the proposal for an instant.

'We will make a thorough examination of the ruin outside first,' he began; 'that is, as soon as this weather will let us. The whole place will be dripping for a day or two, but I don't mind that.'

A sudden outburst of barks and yelps, accompanied by a clamour of voices, came up from below. Running to the window, they caught sight of the cause of the shouts and howls. The dogs were being led back to their kennels, and as they were in a savage mood, the men were persuading or forcing them on. To the amazement of the brother and sister, Thomas was with the party, apparently as completely at home as if he had never fled from the hounds.

'I say!' exclaimed Alan; 'I wonder how he managed that?'