Clarence E. Mulford, The Man from Bar-20 — Chapter 15 (1918)
“ At the top of the trail a rapier-like flash of fire split the darkness, and then a series of lurid spurts of flame stabbed in short jets, rapidly, regular as the ticking of a clock, marking the place where two heavy guns crashed and jumped as they poured forth a stream of lead down the narrow rock shelf that formed the precarious trail. The canyon roared in one prolonged reverberation and the bullets whined and spatted and screamed in high falsetto as they cleared the wall or struck it to glance out into the valley below. ”
