blank-browed

Her delicate beauty acquired to his eye the serious cast of certain blank-browed Greek statues; and sometimes when his imagination, more than his ear, detected a vague tremor in the tone in which she attempted to make a friendly question seem to have behind it none of the hollow resonance of absent-mindedness, his marvelling eyes gave her an answer more eloquent, though much less to the point, than the one she demanded.

Madame De Mauves Henry James 1879