Question: Did Richard Adams become a full-time author before or after creating the Lapine language?

Context articles: Richard Adams (British politician)
Where the Air Is Clear
Keath Fraser
John le Carré
Lapine language
Richard Adams
The Plague Dogs
Tales from Watership Down
Dickie Adams
Justice (1954 TV series)

Captain Harold Richard Adams (8 October 1912 – 25 June 1978), more commonly Richard Adams, was a Labour Party politician in the United Kingdom.
Where the Air Is Clear (Spanish: La región más transparente ) is a 1958 novel by Mexican writer Carlos Fuentes.
 His first novel, it became an "instant classic" and made Fuentes into an immediate "literary sensation".
 The novel's success allowed Fuentes to leave his job as a diplomat and become a full-time author.
Keath Fraser (born 25 December 1944 in Vancouver, British Columbia) is a Canadian fiction author.
 He lived in London from 1970 to 1973, where he studied at the University of London and earned his Ph.D.
 He later taught English in Calgary, Alberta, Canada for five years as a tenured professor.
 He then stopped teaching to become a full-time author.
David John Moore Cornwell (born 19 October 1931), known by the pseudonym John le Carré ( ), is a British author of espionage novels.
 During the 1950s and the 1960s, he worked for both the Security Service and the Secret Intelligence Service, and began writing novels under his pen name.
 His third novel, "The Spy Who Came in from the Cold" (1963), became an international best-seller and remains one of his best-known works.
 Following the success of this novel, he left MI6 to become a full-time author.
Lapine is a fictional language created by author Richard Adams for his 1972 novel "Watership Down", where it is spoken by rabbit characters.
 The language was again used in Adams' 1996 sequel, "Tales from Watership Down", and has appeared in both the film and television adaptations.
 The fragments of language presented by Adams consist of a few dozen distinct words, and are chiefly used for the naming of rabbits, their mythological characters, and objects in their world.
 The name "Lapine" comes from the French word for rabbit, "lapin", and can also be used to describe rabbit society.
Richard George Adams (9 May 1920 – 24 December 2016) was an English novelist who is best known as the author of "Watership Down", "Shardik" and "The Plague Dogs".
 He studied modern history at university before serving in the British Army during World War II.
 Afterwards, he completed his studies, and then joined the British Civil Service.
 In 1974, two years after "Watership Down" was published, Adams became a full-time author.
The Plague Dogs is the third novel by Richard Adams, author of "Watership Down", about two dogs who escape an animal testing facility and are subsequently pursued by both the government and the media.
 It was first published in 1977, and features a few location maps drawn by Alfred Wainwright, a fellwalker and author.
 The conclusion of the book involves two real-life characters, Adams' long-time friend Ronald Lockley, and the world-famous naturalist Sir Peter Scott.
 Having seen a manuscript, both men readily agreed to be identified with the characters and opinions that Adams had attributed to them, as is shown in Adams' preface to the book.
Tales from Watership Down is a collection of 19 short stories by Richard Adams, published in 1996 as a follow-up to Adams's highly successful 1972 novel about rabbits, "Watership Down".
 It consists of a number of short stories of rabbit mythology, followed by several chapters featuring many of the characters introduced in the earlier book.
 Like its predecessor, "Tales from Watership Down" features epigraphs at the beginning of each chapter and a Lapine glossary.
Richard Adams (born February 13, 1948), known as Dickie Adams, was a gridiron football defensive back who played for the Houston Oilers of the National Football League and the Ottawa Rough Riders of the Canadian Football League.
 After being signed by the Rough Riders, Adams played in 63 regular season games from 1972 to 1976.
 He was named an All-Canadian player from 1972 to 1975.
 Adams became a Grey Cup champion in 1973 after the Rough Riders defeated the Edmonton Eskimos 22–18 in the 61st Grey Cup.
 He also won another Grey Cup with Ottawa in 1976.
Justice is an NBC half-hour drama television series about attorneys of the Legal Aid Society of New York, which aired from April 8, 1954, to March 25, 1956.
 In the 1954–1955 season, "Justice" starred Dane Clark as Richard Adams and Gary Merrill as Jason Tyler.
 In the 1955–1956 season, William Prince replaced Clark in the role of Richard Adams.
 Westbrook Van Voorhis (1903–1968) was the series narrator.