Charles Lutwidge Dodgson (27 January 1832 – 14 January 1898), better known by the pen name Lewis Carroll (/ˈkærəl/ KARR-əl), was an English writer, mathematician, logician, Anglican deacon and photographer. His most famous writings are Alice's Adventures in Wonderland and its sequel Through the Looking-Glass, as well as the poems "The Hunting of the Snark" and "Jabberwocky", all examples of the genre of literary nonsense. He is noted for his facility at word play, logic, and fantasy, and there are societies in many parts of the world (including the United Kingdom, Japan, the United States, and New Zealand) dedicated to the enjoyment and promotion of his works and the investigation of his life.

Dodgson's family was predominantly northern English, with Irish connections. Conservative and High Church Anglican, most of Dodgson's ancestors were army officers or Church of England clergy. His great-grandfather, also named Charles Dodgson, had risen through the ranks of the church to become the Bishop of Elphin. His grandfather, another Charles, had been an army captain, killed in action in Ireland in 1803 when his two sons were hardly more than babies. His mother's name was Frances Jane Lutwidge.

The elder of these sons – yet another Charles Dodgson – was Carroll's father. He reverted to the other family tradition and took holy orders. He went to Westminster School, and then to Christ Church, Oxford. He was mathematically gifted and won a double first degree, which could have been the prelude to a brilliant academic career. Instead he married his first cousin in 1827 and became a country parson.

Dodgson was born in the little parsonage of Daresbury in Cheshire near the towns of Warrington and Runcorn, the eldest boy but already the third child of the four-and-a-half-year-old marriage. Eight more children were to follow. When Charles was 11, his father was given the living of Croft-on-Tees in North Yorkshire, and the whole family moved to the spacious rectory. This remained their home for the next twenty-five years.

Young Charles' father was an active and highly conservative cleric of the Church of England who later became the Archdeacon of Richmond and involved himself, sometimes influentially, in the intense religious disputes that were dividing the church. He was High Church, inclining to Anglo-Catholicism, an admirer of John Henry Newman and the Tractarian movement, and did his best to instill such views in his children. Young Charles was to develop an ambiguous relationship with his father's values and with the Church of England as a whole.

During his early youth, Dodgson was educated at home. His "reading lists" preserved in the family archives testify to a precocious intellect: at the age of seven the child was reading The Pilgrim's Progress. He also suffered from a stammer – a condition shared by most of his siblings – that often influenced his social life throughout his years. At age twelve he was sent to Richmond Grammar School (now part of Richmond School) at nearby Richmond.

In 1846, young Dodgson moved on to Rugby School, where he was evidently less happy.

He left Rugby at the end of 1849 and matriculated at Oxford in May 1850 as a member of his father's old college, Christ Church. After waiting for rooms in college to become available, he went into residence in January 1851. He had been at Oxford only two days when he received a summons home. His mother had died of "inflammation of the brain" – perhaps meningitis or a stroke – at the age of forty-seven.

His early academic career veered between high promise and irresistible distraction. He did not always work hard, but was exceptionally gifted and achievement came easily to him. In 1852 he obtained first-class honours in Mathematics Moderations, and was shortly thereafter nominated to a Studentship by his father's old friend, Canon Edward Pusey. In 1854 he obtained first-class honours in the Final Honours School of Mathematics, graduating Bachelor of Arts. He remained at Christ Church studying and teaching, but the next year he failed an important scholarship through his self-confessed inability to apply himself to study. Even so, his talent as a mathematician won him the Christ Church Mathematical Lectureship in 1855, which he continued to hold for the next twenty-six years. Despite early unhappiness, Dodgson was to remain at Christ Church, in various capacities, until his death.

The young adult Charles Dodgson was about six feet tall, slender, and had curling brown hair and blue or grey eyes (depending on the account). He was described in later life as somewhat asymmetrical, and as carrying himself rather stiffly and awkwardly, though this may be on account of a knee injury sustained in middle age. As a very young child, he suffered a fever that left him deaf in one ear. At the age of seventeen, he suffered a severe attack of whooping cough, which was probably responsible for his chronically weak chest in later life. Another defect he carried into adulthood was what he referred to as his "hesitation", a stammer he acquired in early childhood and which plagued him throughout his life.

The stammer has always been a potent part of the conceptions of Dodgson; it is part of the belief that he stammered only in adult company and was free and fluent with children, but there is no evidence to support this idea. Many children of his acquaintance remembered the stammer while many adults failed to notice it. Dodgson himself seems to have been far more acutely aware of it than most people he met; it is said he caricatured himself as the Dodo in Alice's Adventures in Wonderland, referring to his difficulty in pronouncing his last name, but this is one of the many "facts" often-repeated, for which no first-hand evidence remains. He did indeed refer to himself as the dodo, but that this reference was to his stammer is simply speculation.

Although Dodgson's stammer troubled him, it was never so debilitating that it prevented him from applying his other personal qualities to do well in society. At a time when people commonly devised their own amusements and when singing and recitation were required social skills, the young Dodgson was well equipped to be an engaging entertainer. He reportedly could sing tolerably well and was not afraid to do so before an audience. He was adept at mimicry and storytelling, and was reputedly quite good at charades.

From a young age, Dodgson wrote poetry and short stories, both contributing heavily to the family magazine Mischmasch and later sending them to various magazines, enjoying moderate success. Between 1854 and 1856, his work appeared in the national publications, The Comic Times and The Train, as well as smaller magazines like the Whitby Gazette and the Oxford Critic. Most of this output was humorous, sometimes satirical, but his standards and ambitions were exacting. "I do not think I have yet written anything worthy of real publication (in which I do not include the Whitby Gazette or the Oxonian Advertiser), but I do not despair of doing so some day," he wrote in July 1855. Sometime after 1850, he did write puppet plays for his siblings' entertainment, of which one has survived, La Guida di Bragia.

In 1856 he published his first piece of work under the name that would make him famous. A romantic poem called "Solitude" appeared in The Train under the authorship of "Lewis Carroll." This pseudonym was a play on his real name; Lewis was the anglicised form of Ludovicus, which was the Latin for Lutwidge, and Carroll an Irish surname similar to the Latin name Carolus, from which the name Charles comes.

In the same year, 1856, a new Dean, Henry Liddell, arrived at Christ Church, bringing with him his young family, all of whom would figure largely in Dodgson's life and, over the following years, greatly influence his writing career. Dodgson became close friends with Liddell's wife, Lorina, and their children, particularly the three sisters: Lorina, Edith, and Alice Liddell. He was for many years widely assumed to have derived his own "Alice" from Alice Liddell. This was given some apparent substance by the fact the acrostic poem at the end of Through the Looking Glass spells out her name, and that there are many superficial references to her hidden in the text of both books. It has been pointed out that Dodgson himself repeatedly denied in later life that his "little heroine" was based on any real child, and frequently dedicated his works to girls of his acquaintance, adding their names in acrostic poems at the beginning of the text. Gertrude Chataway's name appears in this form at the beginning of The Hunting of the Snark, and no one has ever suggested this means any of the characters in the narrative are based on her.

Though information is scarce (Dodgson's diaries for the years 1858–1862 are missing), it does seem clear that his friendship with the Liddell family was an important part of his life in the late 1850s, and he grew into the habit of taking the children (first the boy, Harry, and later the three girls) on rowing trips accompanied by an adult friend to nearby Nuneham Courtenay or Godstow.

It was on one such expedition, on 4 July 1862, that Dodgson invented the outline of the story that eventually became his first and largest commercial success. Having told the story and been begged by Alice Liddell to write it down, Dodgson eventually (after much delay) presented her with a handwritten, illustrated manuscript entitled Alice's Adventures Under Ground in November 1864.

Before this, the family of friend and mentor George MacDonald read Dodgson's incomplete manuscript, and the enthusiasm of the MacDonald children encouraged Dodgson to seek publication. In 1863, he had taken the unfinished manuscript to Macmillan the publisher, who liked it immediately. After the possible alternative titles Alice Among the Fairies and Alice's Golden Hour were rejected, the work was finally published as Alice's Adventures in Wonderland in 1865 under the Lewis Carroll pen-name, which Dodgson had first used some nine years earlier. The illustrations this time were by Sir John Tenniel; Dodgson evidently thought that a published book would need the skills of a professional artist.

The overwhelming commercial success of the first Alice book changed Dodgson's life in many ways. The fame of his alter ego "Lewis Carroll" soon spread around the world. He was inundated with fan mail and with sometimes unwanted attention. Indeed, according to one popular story, Queen Victoria herself enjoyed Alice In Wonderland so much that she suggested he dedicate his next book to her, and was accordingly presented with his next work, a scholarly mathematical volume entitled An Elementary Treatise on Determinants. Dodgson himself vehemently denied this story, commenting "...It is utterly false in every particular: nothing even resembling it has occurred"; and it is unlikely for other reasons: as T.B. Strong comments in a Times article, "It would have been clean contrary to all his practice to identify author of Alice with the author of his mathematical works". He also began earning quite substantial sums of money but continued with his seemingly disliked post at Christ Church.

Late in 1871, a sequel – Through the Looking-Glass and What Alice Found There – was published. (The title page of the first edition erroneously gives "1872" as the date of publication.) Its somewhat darker mood possibly reflects the changes in Dodgson's life. His father had recently died (1868), plunging him into a depression that lasted some years.

In 1876, Dodgson produced his last great work, The Hunting of the Snark, a fantastical "nonsense" poem, exploring the adventures of a bizarre crew of tradesmen, and one beaver, who set off to find the eponymous creature. The painter Dante Gabriel Rossetti reputedly became convinced the poem was about him.

Over the remaining twenty years of his life, throughout his growing wealth and fame, his existence remained little changed. He continued to teach at Christ Church until 1881, and remained in residence there until his death. His last novel, the two-volume Sylvie and Bruno, was published in 1889 and 1893 respectively. It achieved nowhere near the success of the Alice books. Its intricacy was apparently not appreciated by contemporary readers. The reviews and its sales, only 13,000 copies, were disappointing.

The only occasion on which (as far as is known) he travelled abroad was a trip to Russia in 1867 as an ecclesiastical together with the Reverend Henry Liddon. He recounts the travel in his "Russian Journal", which was first commercially published in 1935. On his way to Russia and back he also saw different cities in Belgium, Germany, the partitioned Poland, and France.

He died on 14 January 1898 at his sisters' home, "The Chestnuts" in Guildford, of pneumonia following influenza. He was two weeks away from turning 66 years old. He is buried in Guildford at the Mount Cemetery.