Meanings of watch covertly in English

He watched covertly the repressed excitement in the eyes of Zalu Zako.

The others watched covertly with closed-jaw smirks of amusement.

Smith was watching covertly, a Hindu seated at a neighboring table, who was about to settle his bill.

After a moment Bob became conscious that he himself was being sharply scrutinized by the gray man, and in return watched covertly.

The door closed and Tyacke watched covertly as Bolitho cut the greasy pork on his plate as if it were some rare delicacy.

A few minutes later we were rattling through the streets of Liskeard, with George pointing out various landmarks while I watched covertly for policemen.