The Night Thoreau Spent in Jail is a two-act play by Robert Edwin Lee and Jerome Lawrence written in 1969. Hal B. Wallis is producer of the film based on the play, for which both Lawrence and Lee wrote the screenplay. The play is based on the early life of the title character, Henry David Thoreau, leading up to his night spent in a jail in Concord, Massachusetts. Thoreau was jailed for refusing to pay a poll tax on the grounds that the money might be used to pay for the Mexican-American War, which he opposed.
Writing in the New York Times, Howard Taubman described the ideological relevance of the play to contemporary audiences, stating "this play and its protagonist, though they are of the 19th century, are speaking to today's concerns: an unwanted war in another land, civil disobedience, the interdependence of man and nature, education, the role of government and the governed."
The play does not present events in chronological order; rather, the play features Thoreau remembering earlier parts of his life, not necessarily in the order they occurred. The play opens with Ralph Waldo Emerson, in his old age, recalling the memories of his friend, Henry. The play quickly shifts to Henry's current time in jail because he refused to pay the tax to support the war, where he meets Bailey, a homeless man falsely accused of arson. After meeting Bailey, Thoreau reflects on his recent past. Henry taught Bailey to spell his name by b-a-beanpole-turn the corner-comb-tree.
Henry, who would have graduated from Harvard, but refused to pay the one dollar fee to receive his diploma, becomes a schoolmaster and attempts to teach a class against the school's curriculum, but Deacon Ball, a logical, respected teacher, makes him flog the children, after which he quits. After leaving the school, Henry and John (Henry's brother) start an outdoor school, but soon all of the children are pulled out of classes by concerned parents. Ellen, the sibling of one of the former classmates, went to the school to find out more about Transcendentalism, which her father claimed the school was based on. After the school is disbanded and the children leave, Henry takes her on a boat ride. He tells her about Transcendentalism, and about how he loves her, but it becomes very awkward and he tells her to go to church with John. John is in love with Ellen, and proposes to her, but later Ellen tells him that her father wouldn't allow her to marry either of the Thoreau brothers.