From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
To See what Others cannot See.
Take a cat's eye, lay it in salt water, let it remain there for three days, and then for six days into the rays of the sun, after this have it set in silver, and hang it around your neck.
The grimoire Egyptian Secrets of Albertus Magnus lists this spell.
Timeline of related events
1725Publication of Egyptian Secrets of Albertus Magnus (lists this spell)
1869English-language translation of Egyptian Secrets (lists this spell)