year--come down in a short rainy season of four months. The water
filters through the sand-hills, and forms great stagnant lagoons; a
rank tropical vegetation springs up, and the air is soon filled with
pestilential vapours. Add to this that the water is unwholesome; the
city too is placed in a sand-bath which keeps up a regular temperature,
by accumulating heat by day and giving it out into the air by night, so
that night gives no relief from the stifling closeness of the day. No
wonder that Mr. Bullock, the Mexican traveller, as he sat in his room
here in the hot season, heard the church-bells tolling for the dead
from morning to night without intermission; for weeks and weeks, one
can hardly even look into the street without seeing a funeral.

We turned back through the city, and walked along watching the
Zopilotes--great turkey-buzzards--with their bald heads and foul
dingy-black plumage. They were sitting in compact rows on parapets of
houses and churches, and seemed specially to affect the cross of the
cathedral, where they perched, two on each arm, and some on the top.
When some offal was thrown into the streets, they came down leisurely
upon it, one after another; their appearance and deportment reminding
us of the undertaker's men in England coming down from the hearse at
the public-house door, when the funeral is over. In all tropical
America these birds are the general scavengers, and there is a heavy
fine for killing them.[4]

Scarcely any one is about in the streets this afternoon, except a gang
or two of convicts dragging their heavy chains along, sweeping and
mending the streets. This is a punishment much approved of by the
Mexican authorities, as combining terror to evil-doers with advantage
to the community. That it puts all criminals on a level, from murderers
down to vagrants, does not seem to be considered as a matter of much