Transcriber's Note
The following typographical errors are noted, but not corrected in the text:
page 116: "typotypes" should be "topotypes"
page 116: "Potosi" should be "Potosí"
page 116: "Sán Miguel" should be "San Miguel"
page 116: "Sán Isidro" should be "San Isidro"
page 117: "pleateau" should be "plateau"
page 120: "Nuevo Leon" should be "Nuevo León"