“The renowned Thoreau scholar Robert Sattelmeyer spotted an odd entry in the Boston Vigilance Committee’s accounting books and wondered: is that the Samuel Clemens, who grew up to be Mark Twain? The committee used most of its funds to help runaway slaves escape to freedom, in direct violation of the Fugitive Slave Act of 1850. But in an unusual expenditure in September 1854, the radical abolitionists sent $25.50 to a Samuel Clemens for ‘passage from Missouri Penitentiary to Boston — he having been imprisoned there two years for aiding Fugitives to escape.'”