Marge,
I have a copy of a map of Aguas. from 1943 showing Santiago located
almost directly south of Rincon de Romos and Pabellon, almost
directly east of San Jose de Gracia, and northwest of San Francisco
de los Romos.
(Carta General del Estado de Aguas., 5 May 1943, Mapas de México,
Aguas., Colección Geográfica Patria)
Also, in Beatriz Rojas' book, "Las Instituciones de Gobierno
y la Elite Local", there are actually two haciendas listed by
that name. She lists one in a chart called "Las grandes haciendas
y sus dueños a fines del siglo XVII", showing the proprietor
as M. López de Carrasquilla in 1689. She also lists an hacienda
Santiago in another chart on the same page (entitled "Las pequeñas
y medianas haciendas a fines del siglo XVII"), showing the proprietors
in 1670 as heirs to Gerónimo de Orozco (a BIG name in the area
at the time, founding family of Aguas.).
She also includes an old map showing a Santiago as an "Azienda",
south of Pabellon & east of San Jose de Gracia