Question: When did the author of David Copperfield write his last book?

full_context: Document 1: Great Expectations: Great Expectations is the thirteenth novel by Charles Dickens and his penultimate completed novel: a bildungsroman that depicts the personal growth and personal development of an orphan nicknamed Pip. It is Dickens's second novel, after David Copperfield, to be fully narrated in the first person. The novel was first published as a serial in Dickens's weekly periodical All the Year Round, from 1 December 1860 to August 1861. In October 1861, Chapman and Hall published the novel in three volumes.
Document 2: Uncle Tom's Cabin: "Uncle Tom's Cabin" first appeared as a 40-week serial in "The National Era", an abolitionist periodical, starting with the June 5, 1851, issue. It was originally intended as a shorter narrative that would run for only a few weeks. Stowe expanded the story significantly, however, and it was instantly popular, such that several protests were sent to the "Era" office when she missed an issue. Because of the story's popularity, the publisher John P. Jewett contacted Stowe about turning the serial into a book. While Stowe questioned if anyone would read "Uncle Tom's Cabin" in book form, she eventually consented to the request.
Document 3: A Tale of Two Cities: A Tale of Two Cities Cover of serial Vol. V, 1859 Author Charles Dickens Illustrator Hablot Knight Browne (Phiz) Cover artist Hablot Knight Browne (Phiz) Country United Kingdom Language English Genre Historical novel Published 1859 Publisher London: Chapman & Hall Pages 341 pages (Paperback) Preceded by Little Dorrit (1855 -- 1857) Followed by Great Expectations (1860 -- 1861)
Document 4: David Copperfield (1969 film): David Copperfield is a 1969 British American international co-production television film directed by Delbert Mann based on the novel of the same name by Charles Dickens adapted by Jack Pulman. The film was made in the UK for 20th Century Fox Television with some exteriors filmed in Suffolk. Some interior scenes were filmed at The Swan Hotel in Southwold.
Document 5: Barnaby Rudge: "Barnaby Rudge" was the fifth of Dickens' novels to be published. It had initially been planned to appear as his first, but changes of publisher led to many delays, and it first appeared in serial form in the "Clock" from February to November 1841.
Document 6: Sketches by Boz: Sketches by "Boz," Illustrative of Every-day Life and Every-day People (commonly known as Sketches by Boz) is a collection of short pieces Charles Dickens originally published in various newspapers and other periodicals between 1833 and 1836. They were re-issued in book form, under their current title, in February and August 1836, with illustrations by George Cruikshank. The first complete one volume edition appeared in 1839. The 56 sketches concern London scenes and people, and the whole work is divided into four sections: "Our Parish", "Scenes", "Characters" and "Tales". The material in the first three sections consists of non-narrative pen-portraits, but the last section comprises fictional stories.
Document 7: David Copperfield: David Copperfield is the eighth novel by Charles Dickens. The novel's full title is The Personal History, Adventures, Experience and Observation of David Copperfield the Younger of Blunderstone Rookery (Which He Never Meant to Publish on Any Account). It was first published as a serial in 1849 -- 50, and as a book in 1850. Many elements of the novel follow events in Dickens's own life, and it is often considered his veiled autobiography. It was Dickens' favourite among his own novels. In the preface to the 1867 edition, Dickens wrote, ``like many fond parents, I have in my heart of hearts a favourite child. And his name is David Copperfield. ''The novel describes the journey of the protagonist David Copperfield; modeled after Dickens himself, from impoverished and miserable childhood to becoming a successful and famous author. Like some of his other novels, it contains disturbing descriptions of child abuse.
Document 8: The Long Voyage: "The Long Voyage" is a New Year's Eve short story by Charles Dickens. It was originally published in the 31 December 1853 issue of "Household Words" magazine.
Document 9: Augustus Dickens: Augustus Dickens was the son of Elizabeth ("née" Barrow) and John Dickens, a clerk in the Navy Pay Office at Portsmouth. Charles Dickens's pen name, 'Boz', was actually taken from his youngest brother's family nickname 'Moses', given to him in honour of one of the brothers in "The Vicar of Wakefield" (one of the most widely read novels in the early 19th century), which when playfully pronounced through the nose became corrupted as 'Boses', and later shortened to 'Boz' – pronounced with a long vowel 'o' through the nose.
Document 10: Charles Dickens: The Posthumous Papers of the Pickwick Club (Known as ``The Pickwick Papers '') (Monthly serial, April 1836 to November 1837) The Adventures of Oliver Twist (Monthly serial in Bentley's Miscellany, February 1837 to April 1839) The Life and Adventures of Nicholas Nickleby (Monthly serial, April 1838 to October 1839) The Old Curiosity Shop (Weekly serial in Master Humphrey's Clock, April 1840 to November 1841) Barnaby Rudge: A Tale of the Riots of Eighty (Weekly serial in Master Humphrey's Clock, February to November 1841) A Christmas Carol (1843) The Life and Adventures of Martin Chuzzlewit (Monthly serial, January 1843 to July 1844) Dombey and Son (Monthly serial, October 1846 to April 1848) David Copperfield (Monthly serial, May 1849 to November 1850) Bleak House (Monthly serial, March 1852 to September 1853) Hard Times: For These Times (Weekly serial in Household Words, 1 April 1854, to 12 August 1854) Little Dorrit (Monthly serial, December 1855 to June 1857) A Tale of Two Cities (Weekly serial in All the Year Round, 30 April 1859, to 26 November 1859) Great Expectations (Weekly serial in All the Year Round, 1 December 1860 to 3 August 1861) Our Mutual Friend (Monthly serial, May 1864 to November 1865) The Mystery of Edwin Drood left unfinished due to Dickens's death (Monthly serial, April 1870 to September 1870)
Document 11: Charles Dickens: Dickens's literary success began with the 1836 serial publication of The Pickwick Papers. Within a few years he had become an international literary celebrity, famous for his humour, satire, and keen observation of character and society. His novels, most published in monthly or weekly instalments, pioneered the serial publication of narrative fiction, which became the dominant Victorian mode for novel publication. Cliffhanger endings in his serial publications kept readers in suspense. The instalment format allowed Dickens to evaluate his audience's reaction, and he often modified his plot and character development based on such feedback. For example, when his wife's chiropodist expressed distress at the way Miss Mowcher in David Copperfield seemed to reflect her disabilities, Dickens improved the character with positive features. His plots were carefully constructed, and he often wove elements from topical events into his narratives. Masses of the illiterate poor chipped in ha'pennies to have each new monthly episode read to them, opening up and inspiring a new class of readers.
Document 12: Charles Dickens: The Posthumous Papers of the Pickwick Club (Known as ``The Pickwick Papers '') (Monthly serial, April 1836 to November 1837)
Document 13: The Daily News (UK): The "News" was founded in 1846 by Charles Dickens, who also served as the newspaper's first editor. It was conceived as a radical rival to the right-wing "Morning Chronicle". The paper was not at first a commercial success. Dickens edited 17 issues before handing over the editorship to his friend John Forster, who had more experience in journalism than Dickens. Forster ran the paper until 1870. Charles Mackay, Harriet Martineau, George Bernard Shaw, H. G. Wells, G. K. Chesterton and Ferdinando Petruccelli della Gattina were among the leading reformist writers who wrote for the paper during its heyday. In 1870, the "News" absorbed the "Morning Star". In 1876, "Daily News" and its correspondent Edwin Pears, and later Januarius MacGahan, sounded the first alarm respecting the Turkish atrocities in Bulgaria.
Document 14: Oliver Twist: The novel was originally published in monthly instalments in the magazine Bentley's Miscellany, from February 1837 to April 1839. It was originally intended to form part of Dickens's serial, The Mudfog Papers. George Cruikshank provided one steel etching per month to illustrate each instalment. The novel first appeared in book form six months before the initial serialisation was completed, in three volumes published by Richard Bentley, the owner of Bentley's Miscellany, under the author's pseudonym, "Boz". It included 24 steel-engraved plates by Cruikshank.
Document 15: The Life and Adventures of Nicholas Nickleby (play): The Life and Adventures of Nicholas Nickleby is an 8½ hour-long adaptation of Charles Dickens’ novel, performed in two parts. Part 1 was 4 hours in length with one interval of 15 minutes. Part 2 was 4½ hours in length with two intervals of 12 minutes. It was originally presented onstage over two evenings, or in its entirety from early afternoon with a dinner break. Later it was presented on television over four evenings.
ground_truth: April 1870 to September 1870
sub_queries: the author of the book david copperfield is Answer: Charles Dickens
when did Charles Dickens write his last book Answer: April 1870 to September 1870