Please tell the figures of speech used in the following sentences:
..A man who became obsessed with the fields of human race , who saw clearly ahead a black wall of night.
The geographic core in Twain's early years, was a great valley of the Mississippi River , main artery of transportation in the young nation's heart.
he went west by stagecoach and succumbed to the epidemic of gold and silver fever in Nevada's Washoe region.
From the discouragement of his mining failures, Mark Twain began digging his way to regional fame as newspaper reporter and humanist.
...But for making money, his pen would prove mightier than his pickax.
Mark Twain honed and experimented with his new writing muscles...
"It was a splendid population-- for all the slow, sleepy, sluggish- brained sloths stayed at home..."
" It was that a population... and rushing them through with a magnificent dash and daring and recklessness of cost or consequences..."
Bitterness fed on the man who had made the world laugh.
... a world which will lament them a day and forget them forever...
