There was no answer to his knock, and by trying the knob he found that she had locked herself in.
He fumbled for the knob, and it turned with a grating sound.
With his hand on the knob of the drawing-room door Austin paused and looked at him.
They stopped at the door, and some one fumbled noisily at the knob.
We had planned a trip to the Knob the next day, and were to camp ...