The Swallows are the Imperishable Stars : Swallow Song Cuff by Ghost and Lola : A Blackened bird alights on silver cuff
During the Old Kingdom of Egypt, swallows were associated with stars and therefore the souls of the dead. The Book of the Dead specifically instructs the deceased on how to transform into a swallow. In Spell 1216 of the Pyramid Texts, the pharaoh describes how he has "gone to the great island in the midst of the Field of Offerings on which the swallow gods alight; the swallows are the imperishable stars." The imperishable stars were those near the North Star that never seemed to rise or set, and therefore were "constant".