Hearts of Three by Jack London — Read

While Francis and the peon hurried up the ravine-trail in safety, the ravine itself, below where the oil flowed in, had become a river of flame, which drove the Jefe, Torres, and the gendarmes to scale the steep wall of the ravine. At the same time the party of haciendados in pursuit of the peon was compelled to claw back and up to escape out of the roaring canyon.

Ever the peon glanced back over his shoulder, until, with a cry of joy, he indicated a second black-smoke pillar rising in the air beyond the first burning well.