Kenelm's locked the doors, and the keys are right next to his room door.

I can't get down." Here was an unexpected obstacle.

Caleb was nonplused.
"Go home!" wailed the voice from above.

"Don't stand there.

Go HOME! Can't you SEE it ain't any use?
Go HOME!" Five minutes before he received this order Mr.Hammond would have been only too glad to go home.