Greenish White Water

To a landsman, no whale, nor any sign of a herring, would have been visible at that moment; nothing but a troubled bit of greenish white water, and thin scattered puffs of vapor hovering over it, and suffusingly blowing off to leeward, like the confused scud from white rolling billows. The air around suddenly vibrated and tingled, as it were, like the air over intensely heated plates of iron.