Then there shot through the inscrutability of it a sudden gleam of malice that was like a spurt of flame.
"The Desert Valley"
Jackson Gregory
While her eyes held his, he returned her gaze with a steady inscrutability, and the two stood there with a long silence between them.
"The Tempering"
Charles Neville Buck
They scanned the old housekeeper's face narrowly next morning, as she carried the coffee into the dining-room, but her countenance wore its accustomed aspect of grim inscrutability.
"The Manor House School"
Angela Brazil