Answer the question at the end by quoting:

Electric Ladyland is the third and final studio album by English-American rock band the Jimi Hendrix Experience, released in October 1968 by Track Records/Polydor, and Reprise Records in North America. The double album was the only record from the band produced by Jimi Hendrix. By mid-November, it had charted at number one in the United States, where it spent two weeks at the top spot. Electric Ladyland was the Experience's most commercially successful release and their only number one album.
Recording sessions for the Jimi Hendrix Experience's third and final studio album, Electric Ladyland, began at the newly opened Record Plant Studios, with Chas Chandler as producer and engineers Eddie Kramer and Gary Kellgren. As recording progressed, Chandler became increasingly frustrated with Hendrix's perfectionism and his demands for repeated takes. Hendrix allowed numerous friends and guests to join them in the studio, which contributed to a chaotic and crowded environment in the control room and led Chandler to sever his professional relationship with Hendrix. Redding later recalled: "There were tons of people in the studio; you couldn't move. It was a party, not a session." Redding, who had formed his own band in mid-1968, Fat Mattress, found it increasingly difficult to fulfill his commitments with the Experience, so Hendrix played many of the bass parts on Electric Ladyland. The album's cover stated that it was "produced and directed by Jimi Hendrix". The double LP was the only Experience album to be mixed entirely in stereo. During the Electric Ladyland recording sessions, Hendrix began experimenting with other combinations of musicians, including Jefferson Airplane's Jack Casady and Traffic's Steve Winwood, who played bass and organ respectively on the fifteen-minute slow-blues jam, "Voodoo Chile". During the album's production, Hendrix appeared at an impromptu jam with B.B. King, Al Kooper, and Elvin Bishop. Electric Ladyland was released in October 1968, and by mid-November it had reached number one in the US, spending two weeks at the top spot. The double LP was the Experience's most commercially successful release and their only number one album. It peaked at number six in the UK, spending 12 weeks on the chart. Hendrix's studio perfectionism was legendary - he and Mitch Mitchell recorded well over 50 takes of "Gypsy Eyes" over three sessions. Hendrix was generally insecure about his voice and often recorded his vocals hidden behind studio screens. Hendrix sang all the backing vocals himself on the title track and on "Long Hot Summer Night". He was said to be very happy with the vocal results on "Have You Ever Been (To Electric Ladyland)".

How long did it take

Answer the question at the end by quoting:

Robert Stewart, 2nd Marquess of Londonderry, (18 June 1769 - 12 August 1822), usually known as Lord Castlereagh, which is derived from his courtesy title Viscount Castlereagh, (UK: KAH-s@l-rey), was an Irish/British statesman. As British Foreign Secretary, from 1812 he was central to the management of the coalition that defeated Napoleon and was the principal British diplomat at the Congress of Vienna. Castlereagh was also leader of the British House of Commons in the Liverpool government from 1812 until his suicide in August 1822. Early in his career, as Chief Secretary for Ireland, he was involved in putting down the Irish Rebellion of 1798 and was instrumental in securing the passage of the Irish Act of Union of 1800.
Robert Stewart was born in Henry Street, Dublin, Ireland, in 1769 the son of Robert Stewart (1739-1821) of Newtownards and Comber in County Down, with properties in Counties Donegal and Londonderry. The family seat was Mount Stewart, County Down. The elder Stewart was an Irish politician and prominent Ulster landowner He was created Baron Londonderry in 1789, Viscount Castlereagh in 1795, and Earl of Londonderry in 1796 by King George III. In 1771 he was elected in the Whig interest to the Irish House of Commons, where he was a supporter of Lord Charlemont and his allies who called for greater independence from Britain. From the Act of Union of 1800, however, he sat in the British House of Lords as an Irish representative peer. In 1816 he was created Marquess of Londonderry by the Prince Regent. Stewart's mother, who died in childbirth when he was a year old, was Lady Sarah Frances Seymour-Conway, daughter of Francis Seymour-Conway, 1st Marquess of Hertford (a former British Ambassador to France (1764-65) and Lord Lieutenant of Ireland (1765-66)) and Isabella Fitzroy, daughter of Charles FitzRoy, 2nd Duke of Grafton. His father remarried five years later to Lady Frances Pratt, daughter of Charles Pratt, 1st Earl Camden (1714-94), a leading English jurist and prominent political supporter of both the 1st Earl of Chatham and his son, William Pitt the Younger. Through the elder Stewart's marriages, he linked his family with the upper ranks of English nobility and political elites. The Camden connection was to be especially important for the political careers of both him and his elder son. By Frances Pratt, Stewart's father had ten children who survived to adulthood, including Stewart's half-brother, Charles William Stewart (later Vane), Baron Stewart of Stewart's Court and Ballylawn in County Donegal (1814) and 3rd Marquess of Londonderry (1822). In 1794, Stewart married Amelia (Emily) Hobart a daughter of John Hobart, 2nd Earl of Buckinghamshire, a former British Ambassador to Russia (1762-65) and Lord Lieutenant of Ireland (1776-80). Her mother, Caroline Conolly, was the granddaughter of William Conolly, Speaker of the Irish House of Commons in the early 18th century and one of the wealthiest landowners in Ireland. Caroline's brother, Thomas Conolly, was married to Louisa Lennox, sister of Emily FitzGerald, Duchess of Leinster, whose son and Emily's cousin-by-marriage, the aristocratic rebel Lord Edward FitzGerald, was a leader of the United Irishmen and one of their martyrs in the early stages of the Irish Rebellion of 1798. Emily Stewart was well known as a hostess for her husband in both Ireland and London and during some of his most important diplomatic missions. In later years she was a leader of Regency London high society as one of the Lady Patronesses of Almack's. She is noted in contemporary accounts for her attractiveness, volubility and eccentricities. By all accounts, the two remained devoted to each other to the end, but they had no children. The couple did, however, care for the young Frederick Stewart, while his father, Stewart's half-brother, Charles, was serving in the army.

Did he have other siblings?
By Frances Pratt, Stewart's father had ten children who survived to adulthood,