Meanings of leathern strings in English

I have neither buckle nor button about me, for I wear nothing but leathern strings, and them of good deer-skins.

The Sky was made its (other) yoke, and the clouds called Samvartaka and Valahaka were the leathern strings of the yoke.

Abdalonim, turning pale, went to another set of pigeon-holes, and took from them some planchettes of sycamore wood strung in packets on leathern strings.

It was too steep for both to ride now, so he tied the bundle to the cantle with leathern strings and started leading the horse.