Describe Mr Balfour physically.

"He was a mean, stooping, narrow-shouldered, clay-faced creature; and his age might have been anything between fifty and seventy. His nightcap was of flannel, and so was the nightgown that he wore, instead of coat and waistcoat, over his ragged shirt. He was long unshaved; but what most distressed and even daunted me, he would neither take his eyes away from me nor look me fairly in the face."