Note 5 — Chapter VI · THE PROBABLE HOR-SHESU WORSHIP.
Reading edition
"The temples of the gods ought to be so placed that the statue, which has its station in cella, should, if there be nothing to interfere with such a disposition, face the west; in order that those who come to make oblations and offer sacrifices may face the east.... When temples are built in the neighbourhood of a river, they should command a view of its banks, like the temples of Egypt upon the borders of the Nile."—Vitruvius, Civil Architecture, Section I., Chapter V.