Egyptian priests noticed a link between the appearance of this "dog star" & the flooding of the Nile
However, the symbolic link between Sirius and occult knowledge has ... or the 
Dog-star, the forerunner of the inundation of the Nile; the God ANUBIS... [DOC] [TLE] Class #2 (August 28) - NMSU Astronomy [PAR] With the rise of priests came more careful observation of natural cycles.