Whenever I think of it, however, the first memories that leap to my mind are those of the stench of the open drains and of the scavenger carts going their rounds with the _zaphilotes_ or vultures actually sitting upon them.

As it happened, those carts were very necessary then, for a yellow fever epidemic was raging in the place.

Having nothing particular to do I stopped there for three weeks to study it, working in the hospitals with the local doctors, for I felt no fear of yellow fever--only one contagious disease terrifies me, and with that I was soon destined to make acquaintance.
At length I arranged to start for the City of Mexico, to which in those days the journey from Vera Cruz was performed by diligence as the railway as not yet finished.

At that time Mexico was a wild country.
Wars and revolutions innumerable, together with a certain natural leaning that way, had reduced a considerable proportion of its inhabitants to the road, where they earned a precarious living--not by mending it, but by robbing and occasionally cutting the throats of any travellers whom they could catch.
The track from Vera Cruz to Mexico City runs persistently uphill; indeed, I think the one place is 7000 feet above the level of the other.
First, there is the hot zone, where the women by the wayside sell you pineapples and cocoanuts; then the temperate zone, where they offer you oranges and bananas; then the cold country, in which you are expected to drink a filthy liquid extracted from aloes called _pulque_, that in taste and appearance resembles soapy water.
It was somewhere in the temperate zone that we passed a town consisting of fifteen _adobe_ or mud houses and seventeen churches.

The excessive religious equipment of this city is accounted for by an almost inaccessible mountain stronghold in the neighbourhood.