En souriant de pitié. Note that there is a touch of

contempt or disdain in pitié as used here.

18, — Témoin. “ Témoin,” though a noun, is often employed

adverbially to introduce something intended to serve as proof : Le duc de Wellington était un grand guerrier, témoin ses victoires ; cela n’est pas vrai, témoifi cette lettre, Render, ‘for proof, just observe.’