There was the sure indication of accurate knowledge, the obvious self-confidence of experience in everything he did.

Even to her untutored eyes the doctor seemed to be walking with a very firm tread.
At length, after an hour's work, he turned to Mandy who was assisting him and said: "Now you can both go to sleep.

I shall need you no more till morning.

I shall keep an eye on him.

Off you go.