Sirius astrological symbol was listed by Heinrich Cornelius Agrippa. Many cultures have historically attached special significance to Sirius, particularly in relation to dogs. It is often colloquially called the "Dog Star" as the brightest star of Canis Major, the "Great Dog" constellation. It was classically depicted as Orion's dog. The Ancient Greeks thought that Sirius's emanations could affect dogs adversely, making them behave abnormally during the "dog days," the hottest days of the summer. The Romans knew these days as "dies caniculares", and the star Sirius was called Canicula, "little dog." The excessive panting of dogs in hot weather was thought
The Ancient of Days threw it from him, and with an air of exulting triumph exclaimed, "There, that will do! I cannot mend it." The image was used as the cover for Stephen Hawking's book "God Created the Integers". There are currently thirteen known extant copies of "Europe a Prophecy". Because of Blake's production process of hand colouring each print, each image has own unique qualities. The following images of "The Ancient of Days" are those available via the digital archiving project, the William Blake Archive: The Ancient of Days The Ancient of Days is a design by William Blake, originally published as the