Cartoon from an 1861 Vanity Fair: "Grand ball given by the whales in honor of the discovery of the oil wells in Pennsylvania."

And from Melville:

All was now a phrensy. 'The White Whale-the White Whale!' was the cry from captain, mates, and harpooneers, who, undeterred by fearful rumours, were all anxious to capture so famous and precious a fish; while the dogged crew eyed askance, and with curses, the appalling beauty of the vast milky mass, that lit up by a horizontal spangling sun, shifted and glistened like a living opal in the blue morning sea.

And lo! close under our lee, not forty fathoms off, a gigantic Sperm Whale lay rolling in the water like the capsized hull of a frigate, his broad, glossy back, of an Ethiopian hue, glistening in the sun's rays like a mirror. But lazily undulating in the trough of the sea, and ever and anon tranquilly spouting his vapory jet, the whale looked like a portly burgher smoking his pipe of a warm afternoon.

But far beneath this wondrous world upon the surface, another and still stranger world met our eyes as we gazed over the side. For, suspened in those watery vaults, floated the forms of the nursing mothers of the whales, and those that by their enormous girth seemed shortly to become mothers. The lake, as I have hinted, was to a considerable depth exceedingly transparent; and as human infants while sucking will calmly and fixedly gaze away from the breast, as if leading two different lives at the time; and while yet drawing mortal nourishment, be still spiritually feasting upon some unearly reminiscence;--even so did the young of these whales seem looking up toward us, but not at us, as if we were but a bit of Gulf-weed in their new-born sight. Floating on their sides, the mothers also seemed quietly eyeing us. One of these little infants, that from certain queer tokens seemed hardly a day old, might have measured some fourteen feet in length, and some six feet in girth. He was a little frisky; thought as yet his body seemed scarce yet recovered from that irksome position it had so lately occupied in the maternal reticule; where, tail to head, and all ready for the final spring, the unborn whale lies bent like a Tartar's bow. The delicate side-fins, and the palms of his flukes, still freshly retained the plaited crumpled appearance of a baby's ears newly arrived from foreign parts.

"There she blows!-there she blows! A hump like a snow-hill! It is Moby-Dick!"

And thus, through the serene tranquilities of the tropical sea, among waves whose hand-clappings were suspended by exceeding rapture, Moby-Dick moved on, still withholding from sight the full terror of his submerged trunk, entirely hiding the wrenched hideousness of his jaw. But soon the fore part of him slowly rose from the water; for an instant his whole marbleized body formed a high arch, like Virginia's Natural Bridge, and warningly waving his bannered flukes in the air, the grand god revealed himself, sounded, and went out of sight. Hoveringly halting, and dipping on the wing, the white sea-fowls longingly lingered over the agitated pool that he left.