Unsleeping

All that night Saxon lay, unsleeping, without taking off her clothes, and when she arose in the morning and washed her face and dressed her hair she was aware of a strange numbness, of a feeling of constriction about her head as if it were bound by a heavy band of iron.

Source: wiktionary

Did you fixedly gaze, too, upon that ribbed and dented brow; there also, you would see still stranger foot-prints—the foot-prints of his one unsleeping, ever-pacing thought.

Source: wiktionary

Captain Kennedy, who is the Commodore of the fleet, and so always commands the newest and best ship of the line, is an admirable seaman, with a quick eye for everything, always on deck at critical moments, watching with unsleeping vigilance over the safety of all on board.

Source: wiktionary

An unsleeping eye watches the steam pressure and steadily regulates the firing much more economically and patiently than the most experienced fireman.

Source: wiktionary