Hyacinthe continued to concentrate, his black eyes wide and blurred, shifting, seeing something beyond the bounds of mortal vision.

"I can see the shoals to which the rest are blind," Grimes declares, striking the classic pose of the Romantic artist glimpsing truths beyond mortal vision.

The darkness of the sea isn't a shadow cast over mortal vision.

Can mortal vision see the dead and living in the solitudes of the Frozen Deep?

Even with mortal vision and in the dark woods she was aware of his height, wide shoulders, and strong, handsome features.

But the light was behind us, and his mortal vision wasn't sharp enough for that.

And there was just a hint, gone again before I could focus my mortal vision on them, of red and ghostly wings sprouting from broad shoulders.

Some were so small and approached so swiftly that it taxed my mortal vision to catch sight of them at all.

And now of course, I saw as a vampire and could not even remember those key gradations of mortal vision in my brief Faustian youth.

The last line of the book ends with "but she will never cease to track them till beyond mortal vision".