If he's any sense, he won't stay here tamely and wait to be hanged." John Cavendish looked at her helplessly.  <SEP> He is clearly the one to blame, so he should leave before he's hanged.
If They have any sense, They won't stay here tamely and wait to be hanged. "John Cavendish looked at her helplessly. <SEP> They is clearly the one to blame, so They should leave before Their's hanged.