He entered the army , becoming major - general in 1688 .
Before this date he had been returned in succession to his father as one of the Members of Parliament for Northumberland , which county he represented from 1677 to 1687 .
He entered the army , becoming major - general in 1688 , but before this date he had been returned in succession to his father as one of the Members of Parliament for Northumberland , which county he represented from 1677 to 1687 .