Instantly an echo resounded with clapping crash.

The initial report was nothing to the echo.

It was a terrible, living, reverberating, detonating crash.

The wall threw the sound across, and could have made no greater roar if it had slipped in avalanche.

From cliff to cliff the echo went in crashing retort and banged in lessening power, and boomed in thinner volume, and clapped weaker and weaker till a final clap could not reach across the waiting cliff.
In the pitchy darkness Venters led Bess, and, groping his way, by feel of hand found the entrance to her cave and lifted her up.