2 adjectives to describe furtive

The handsome presence of the stranger and his charm of manner were of no avail with Monna Ghita; her noisy rating of him drew Bratti and the barber, Nello, to the spot, and with these he was glad to make good his escape, having waived a furtive adieu to the pretty Tessa.

I thought he seemed depressed, even a little furtive, and yet on analysis I could discover nothing definite on which to base such a conclusion.

2 adjectives to describe  furtive