1.   A keen observer, or possibly any male over the age of twelve, might well have noticed the small hand-gun nestling in her cleavage.

2.   Aesop must have been a keen observer of natural animal rhythms.

3.   He was also a very keen observer of rugger, to my everlasting relief.

4.   Further, the keen observer of the lesser-spotted, great warbler or reedy pipit of the species, will note that there are no hats.

5.   A keen observer, Vrabel has learned a lot about how to achieve long-term success from his new teammate and neighbor in the locker room, Bryan Cox.

6.   A keen observer of postwar industrial culture, Smithson preferred sites like abandoned quarries or gigantic airport runways to the untouched backdrops favored by other earthworks artists.

7.   Alford and Duguid are part of the new generation of intellectual, history-minded authors, keen observers of everyday life.

8.   He has a special gift for writing complex roles for women and is a keen observer of modern urban life.