Nana, who had been barking distressfully all the evening, was quiet now.

It was her silence they had heard.
"Out with the light! Hide! Quick!" cried John, taking command for the only time throughout the whole adventure.

And thus when Liza entered, holding Nana, the nursery seemed quite its old self, very dark, and you would have sworn you heard its three wicked inmates breathing angelically as they slept.

They were really doing it artfully from behind the window curtains.
Liza was in a bad temper, for she was mixing the Christmas puddings in the kitchen, and had been drawn from them, with a raisin still on her cheek, by Nana's absurd suspicions.

She thought the best way of getting a little quiet was to take Nana to the nursery for a moment, but in custody of course.
"There, you suspicious brute," she said, not sorry that Nana was in disgrace.