Below Lerdo could be seen a side river of…
source date: 1891
availability: public-domain

Below Lerdo could be seen a side river of bluish purple fire flowing down into the Colo- rado near the gulf, where it steamed, sputtered and added more to the general confusion. The river of fire is undoubtedly from the sulphur mountain, which it is feared, has been set on fire from the volume of burning and inflam- mable material thrown out from the volcanoes, which heretofore have never been known to be guilty of anything worse than an occasional spit of hot water.