I found it on Google, Dano..... I will navigate your remarks with more care so as to remain in the same league as you......
Twain studied 2,000 miles (3,200 km) of the Mississippi for more than two years before he received his steamboat pilot license in 1859. This occupation gave him his pen name, Mark Twain, from "mark twain," the cry for a measured river depth of two fathoms.
Re: according to Daniel
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