The guards had noted his approach and they moved out to head him off.
Noting his approach, the lieutenant looked up from his meal.
He looked at the clouds again, noting their approach.
Surely, by now, they would have noted the ship's approach.
They had of course noted his approach in the mirror, and had come out to meet the party!
Elbryan noted the man's approach and was ready when the deadly monk came in.
It will face the door, so I may note enemy's approach.
Certain half-human bandits had noted his approach, and now they set upon him.
The chairman noted their approach and interrupted his speech.
She noted his approach but did not turn around.