USED AMONGST THE SECRET SOCITIES AS COMMS
Exert below.
Smithsonian Institution )
It seems that Sirius still forms an important part of religious beliefs and spiritual practice. The Dog Star is thought to be the central focus of the teachings and symbolism of some secret societies that survive until this day.
So, from the beginning of civilization to modern times, from remote tribes of Africa to the great capitals of the modern world, Sirius was, and still is, associated with divinity and regarded as a source of great knowledge and power. The star that shines brightest to us here on Earth certainly seems to hold a special symbolic importance to mankind.
https://www.ancient-origins.net/history-ancient-traditions/what-so-special-about-sirius-dog-star-009232