be nervous

References in classic literature ?
My Aunt Jane," remarked Peter, "used to say that an old teacher of hers told her that when she was going to recite or speak in public she must just get it firmly into her mind that it was only a lot of cabbage heads she had before her, and she wouldn't be nervous.
One mightn't be nervous, but I don't think there would be much inspiration in reciting to cabbage heads," said the Story Girl decidedly.
Give your evidence,' said the King; `and don't be nervous, or I'll have you executed on the spot.
I had recovered strength amazingly since my landing, but I was still inclined to be nervous and to break down under any great stress.