Through the 1860s, San Francisco continued to flourish as the solitary epicenter of urbanism and artistic creativity on the Pacific Coast. During this time, important figures like John Muir and Samuel Clemens arrived in California, with Muir going directly to Yosemite Valley and Clemens joining his brother in Carson City, Nevada after fleeing the Civil War. The literature of 1850s California was characterized by humor, history, and memoir, shifting in the 1860s to focus more on local color, literary journalism, and poetry.