On July 24 or July 25, 1846, Thoreau ran into the local tax collector, Sam Staples, who asked him to pay six years of delinquent poll taxes. Thoreau refused because of his opposition to the Mexican-American War and slavery, and he spent a night in jail because of this refusal. (The next day Thoreau was freed when someone, likely his aunt, paid the tax against his wishes.) The experience had a strong impact on Thoreau. In January and February 1848, he delivered lectures on "The Rights and Duties of the Individual in relation to Government" explaining his tax resistance at the Concord Lyceum. Bronson Alcott attended the lecture, writing in his journal on January 26:
Heard Thoreau's lecture before the Lyceum on the relation of the individual to the State– an admirable statement of the rights of the individual to self-government, and an attentive audience. His allusions to the Mexican War, to Mr. Hoar's expulsion from Carolina, his own imprisonment in Concord Jail for refusal to pay his tax, Mr. Hoar's payment of mine when taken to prison for a similar refusal, were all pertinent, well considered, and reasoned. I took great pleasure in this deed of Thoreau's.
—Bronson Alcott, Journals (1938)
Thoreau revised the lecture into an essay entitled Resistance to Civil Government (also known as Civil Disobedience). In May 1849 it was published by Elizabeth Peabody in the Aesthetic Papers. Thoreau had taken up a version of Percy Shelley's principle in the political poem The Mask of Anarchy (1819), that Shelley begins with the powerful images of the unjust forms of authority of his time—and then imagines the stirrings of a radically new form of social action.
At Walden Pond, he completed a first draft of A Week on the Concord and Merrimack Rivers, an elegy to his brother, John, that described their 1839 trip to the White Mountains. Thoreau did not find a publisher for this book and instead printed 1,000 copies at his own expense, though fewer than 300 were sold.:234 Thoreau self-published on the advice of Emerson, using Emerson's own publisher, Munroe, who did little to publicize the