Shadow

Even if not the slightest other part of the creature be visible, this isolated fin will, at times, be seen plainly projecting from the surface. When the sea is moderately calm, and slightly marked with spherical ripples, and this gnomon-like fin stands up and casts shadows upon the wrinkled surface, it may well be supposed that the watery circle surrounding it somewhat resembles a dial, with its style and wavy hour-lines graved on it. On that Ahaz-dial the shadow often goes back.

And Ahab chanced so to stand, that the Parsee occupied his shadow; while, if the Parsee’s shadow was there at all it seemed only to blend with, and lengthen Ahab’s. As the crew toiled on, Laplandish speculations were bandied among them, concerning all these passing things.