2 adjectives to describe rictus

Lantenac was the first of these profiles, Cimourdain was the second; only the bitter rictus of Lantenac was covered with shadow and night, and on the fatal brow of Cimourdain was a gleaming of the dawn" (ii. 91).

11¾d.), we find all the glory that was Greece and the grandeur that was Rome; the Olympian serenity of HOMER, the pity and terror of ÆSCHYLUS, the poignancy of CATULLUS, the saucy mirth of ARISTOPHANES, the sanity of SHAKSPEARE, the macabre gruesomeness of BAUDELAIRE, the sardonic rictus of HEINE and the geniality of TROLLOPE.

2 adjectives to describe  rictus