NOThe scream was the more terrible because he had never expected or dreamed that Professor McGonagall could make such a sound.

NO
The scream was the more terrible because he had never expected or dreamed that Professor McGonagall could make such a sound.
J.K. Rowling

NOThe scream was the more terrible because he had never expected or dreamed that Professor McGonagall could make such a sound. J.K. Rowling