"I expect he's awake, anyway, and one pebble will make him come to the window.

See, the window's open anyway; we can just fling a pebble in." "If we can aim straight enough," said Molly.
After one or two vain attempts, Kitty sent a good-sized pebble straight through the open window, and it landed on the floor straight beside King's bed.
In another moment a tousled head and a pair of shoulders, humped into a bathrobe, appeared at the window.
Seeing the girls, King's face broke into a broad grin.

"Well, you do beat all!" he cried.

"Have you been out all night ?" "No," called Kitty, "we're just playing around in the morning.

It's perfectly lovely out, King, and we're going to have a picnic, rowing on the river.