Lowry makes reference to a number of recognisable streets in Cuernavaca in the fictional topography of Quauhnahuac.
The writing on the wall...
The camión-stop
Calle Guerrero
Calle Humboldt and church
Calle de las Casas
… three smiling vigilantes UTV, 247.
The Calle Hidaglo, descending from the Borda Gardens past the Zócalo, to meet the Calle las Casas (in the book, the Calle Tierra del Fuego), which rises to intersect with the Calle Humboldt (in the book, the Calle Nicaragua).