skulker

The third skulker took advantage of the cessation of firing to tumble down from his perch and fly for his life.

I fished it out and made ready, thinking, of course, that the skulker must certainly be one of Clanahan's gunmen.

He loathed a skulker, and his face was known for any boy who would own to fatigue or confess himself beaten.

No need to call the roll, a skulker would have been detected and kicked into the ranks at the instant.

He did not personally know that the summer-house was occupied, but he argued it from the movements of the other skulker.