You think it is a great bore to be your father's only son, and wish Francis was instead.

That's cross; you may think it's fine, but it isn't, and it is also ungrateful.

You can have great fun if you will only be good-tempered!" "How did you know that--about Francis, I mean ?" asked Michael.
"Does it happen to be true?
Of course it does.

Every cross young man wishes he was somebody else." "No, not quite that," began Michael.
"Don't interrupt.

It is sufficiently accurate.