Definition of "unmurmuringly"

Julien, his nephew, too, had loved; but his cousin's love was given to his brother, and he departed, unmurmuringly indeed, but he dared not yet trust himself to associate calmly with the object of his love: he had ever been a peculiarly sad and silent boy; the fate of his father never for an instant seemed to leave his mind, and he had secretly vowed to avenge him.

1851, Grace Aguilar, The Vale of Cedars‎

He coveted the popular applause as little as he had dreaded the popular opposition; and the evening's painful experiences had taught him anew the bitter lesson to expect no gratitude, and hope for no reward, but simply, and contentedly, and unmurmuringly, to work on in God's vineyard so long as life and health should last.

1902, Frederic William Farrar, Eric‎

When the sky cleared it was discovered that from indispensable fellow-workers they had shrunk to dwarfish protegees, mere units of an inferior category, who were to be told what to do and would be constrained to do it thoroughly if not unmurmuringly.

1920, Emile Joseph Dillon, The Inside Story Of The Peace Conference‎