Of course I shall feel rather lonely just at first." He was so engrossed by his thoughts that he did not take heed to his steps, and was only reminded of his abstraction by his foot suddenly coming in contact with a boy who was lying under a tree, and pitching headfirst over him.
"Holloa!" exclaimed the latter, "what are you about?
You didn't take me for a foot-ball, did you ?" "I beg your pardon," said Harry, jumping up in some confusion.

"I was so busy thinking that I didn't see you.

I hope I didn't hurt you." "Nothing serious.

Didn't you hurt yourself ?" "I bumped my head a little, but it only struck the earth.

If it had been a stone, it might have been different.