Both Uses of

convey
in
The Kite Runner

Baba nodded and gave a thin smile that conveyed little more than feigned interest.
p. 31.6 *

conveyed = communicated or expressed

"I am not," the general said, tilting his head sideways and pressing his hand to his chest to convey humility.
p. 140.3

convey = express

Definitions:

(1) (convey as in: convey her thoughts)
communicate or express
(2) (convey as in: convey title to the property)
to give or transfer -- especially legal title
(3) (convey as in: convey her safely to)
transport

Today, this sense of convey is seldom seen outside of historic literature.
(4) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

Much more rarely (and then probably in classic literature), conveyance can refer to a carriage or other means of transportation.