What is "fixidity"

Usage examples of "fixidity".

It was a hard scene--that smoky, long, ill-smeling room, with its dim, yellow lights, and dark, evil faces, with the stealthy-stepping Turner passing to and fro, and the dead Mulvey staring in horrible fixidity at the ceiling, and the Mexican quivering more and more until he shook violently, then lay still, and with the drinking, somber, waiting cowboy, more fiery and more flaming with every drink, listening for a step that did not come.

It was a hard scene -- that smoky, long, ill-smelling room, with its dim, yellow lights, and dark, evil faces, with the stealthy-stepping Turner passing to and fro, and the dead Mulvey staring in horrible fixidity at the ceiling, and the Mexican quivering more and more until he shook violently, then lay still, and with the drinking, somber, waiting cowboy, more fiery and more flaming with every drink, listening for a step that did not come.