This phenomenon lasted the greater part of the day. The travelers made good progress, however, and about four o'clock the Cordilleras lay full forty miles behind them, the dark outlines being already almost lost in the evening mists. They were all somewhat fatigued with the journey, and glad enough to halt for the night on the banks of the Neuquem, called Ramid, or Comoe by certain geographers, a troubled, turbulent rapid flowing between high red banks.

No incident of any importance occurred that night or the following day. They rode well and fast, finding the ground firm, and the temperature bearable. Toward noon, however, the sun's rays were extremely scorching, and when evening came, a bar of clouds streaked the southwest horizon--a sure sign of a change in the weather. The Patagonian pointed it out to the geographer, who replied:

"Yes, I know;" and turning to his companions, added, "see, a change of weather is coming! We are going to have a taste of PAMPERO."

And he went on to explain that this PAMPERO is very common in the Argentine plains. It is an extremely dry wind which blows from the southwest. Thalcave was not mistaken, for the PAMPERO blew violently all night, and was sufficiently trying to poor fellows only sheltered by their ponchos. The horses lay down on the ground, and the men stretched themselves beside them in a close group. Glenarvan was afraid they would be delayed by the continuance of the hurricane, but Paganel was able to reassure him on that score, after consulting his barometer.