below the freezing point.

I was sorry to learn from my men that the prospects of grass further south were small.
At the village of Bocoyna (elevation 7,100 feet) we were 400 miles from San Diego by the track we had made.

Bocoyna is a corruption of the Tarahumare Ocoina (oco = pine; ina = drips; meaning Dripping Pine, or Turpentine).

Here I had to stop for two days, because no less than six of us, including myself, were suffering from the grippe, which a piercing, dry, cold wind did not tend to alleviate.

However, as the worst cases did not last more than five days, we soon were all well again, though the Mexicans were almost overcome by the effects of the disease.
The presidente here was a powerful-looking half-caste and very original.