Since Shimomura did not come to work for several days, a colleague went to her place and noticed a strange smell beyond the door.

In early 1947, Barrington-Ward's colleagues noticed a decline in his work.

Neither his family nor his colleagues noticed anything askew Tuesday morning.

His colleagues in political science noticed that his office shades were perpetually drawn.

When she stepped out of her car, a colleague noticed an unusual plant and asked her what it was.

"My colleagues have noticed how I spend it," Mallory concluded, with a chill sensation.

"Changes are slow, but already colleagues have noticed that it's easier for me to relate to other people."

Wilhelm Barthlott and his colleagues noticed that ciliates were grazing the surface of the leaves for bacteria.

It was sometime before his colleague noticed his continued absence, and wandered down the passage to find him.

In fact, neither his colleagues nor the man himself has noticed it, and there is no diminution of professional competence.