That same night several of the servants were having a chat together before going to bed. 'What can that noise be?' said one of the housemaids, who had been listening for a moment or two. 'I've heard it the last two nights,' said the cook. 'If there were any about the place, I should have taken it for rats, but my Tom keeps them far enough.' 'I've heard, though,' said the scullery-maid, 'that rats move about in great companies sometimes. There may be an army of them invading us. I've heard the noises yesterday and today too.' 'It'll be grand fun, then, for my Tom and Mrs Housekeeper's Bob,' said the cook. 'They'll be friends for once in their lives, and fight on the same side. I'll engage Tom and Bob together will put to flight any number of rats.' 'It seems to me,' said the nurse, 'that the noises are much too loud for that. I have heard them all day, and my princess has asked me several times what they could be. Sometimes they sound like distant thunder, and sometimes like the noises you hear in the mountain from those horrid miners underneath.' 'I shouldn't wonder,' said the cook, 'if it was the miners after all. They may have come on some hole in the mountain through which the noises reach to us. They are always boring and blasting and breaking, you know.' As he spoke, there came a great rolling rumble beneath them, and the house quivered. They all started up in affright, and rushing to the hall found the gentlemen-at-arms in consternation also. They had sent to wake their captain, who said from their description that it must have been an earthquake, an occurrence which, although very rare in that country, had taken place almost within the century; and then went to bed again, strange to say, and fell fast asleep without once thinking of Curdie, or associating the noises they had heard with what he had told them. He had not believed Curdie. If he had, he would at once have thought of what he had said, and would have taken precautions. As they heard nothing more, they concluded that Sir Walter was right, and that the danger was over for perhaps another hundred years. The fact, as discovered afterwards, was that the goblins had, in working up a second sloping face of stone, arrived at a huge block which lay under the cellars of the house, within the line of the foundations.