Milly was six years old.

She looked older than six.

At any rate she looked a great deal older than Olly, who was nearly five; and you will soon find out that she was a good deal more than a year and a half wiser.
"What's the matter, Olly?
What made you shout so ?" "Oh, come along, come along;" said the little boy, pulling at his sister's hand to make her run.

"Mother wants to tell us something, and she says it's a nice something, and I kissed her like anyfing! but she wouldn't tell me without you." Then the two children set off running, and they flew down a long passage to the drawing-room, and were soon scrambling about a lady who was sitting working by the window.
"Well, monkeys, don't choke me before I tell you my nice something.

Sit on my knee Olly.