What riverboat job did Mark Twain hold before becoming a writer?

Before becoming a writer, Mark Twain worked as a steamboat pilot on the Mississippi River.

Born Samuel Clemens, Twain apprenticed under pilot Horace E. Bixby, who taught him how to navigate the constantly changing channel between St. Louis and New Orleans. Twain studied river landmarks, currents, reefs, submerged snags, rocks, and the signals needed to travel safely, especially at night.

He spent more than two years learning the profession before receiving his pilot’s license. In the nineteenth-century Mississippi trade, piloting was highly skilled and prestigious work; Twain recalled that young boys considered the pilot the grandest position on a steamboat, even ranking the pilot’s authority above the captain’s in practical river knowledge.

This experience shaped both his writing and his pen name. “Mark twain” was a leadsman’s call meaning two fathoms, or twelve feet, a depth considered safe for a steamboat. Twain later transformed his river years into Life on the Mississippi, published in 1883. He was not merely a deckhand or cook, although he performed less senior river work while learning the trade.