(18) Concerning the association of this symbol with the waters of life, Count Goblet d'Alviella, in his Migration of Symbols, calls attention to the fact that an instrument resembling the Crux Ansata and called the Nilometer was used by the ancient Egyptians for measuring and regulating the inundations of the river Nile. It is probable that this relationship to the Nile caused it to be considered the symbol of life, for Egypt depended entirely upon the inundations of this river for the irrigation necessary to insure sufficient crops. In the papyrus scrolls the Crux Ansata is shown issuing from the mouths of Egyptian kings when they pardoned enemies, and it was buried with them to signify the immortality of the soul. It was carried by many of the gods and goddesses and apparently signified their divine benevolence and life-giving power. The Cairo Museum contains a magnificent collection of crosses of many shapes, sizes, and designs, proving that they were a common symbol among the Egyptians.