input: In early appearances, Booth usually performed alongside his father, making his stage debut as Tressel or Tressil in Colley Cibber's version of Richard III in Boston in 1849. His first appearance in New York City was in the character of Wilford in The Iron Chest, which he played at the National Theatre in Chatham Street, on the 27th of September 1850. A year later, on the illness of the father, the son took his place in the character of Richard III.  After his father's death in 1852, Booth went on a worldwide tour, visiting Australia and Hawaii, and finally gaining acclaim of his own during an engagement in Sacramento, California, in 1856.  Before his brother assassinated Lincoln, Edwin had appeared with his two brothers, John Wilkes and Junius Brutus Booth Jr., in Julius Caesar in 1864. John Wilkes played Marc Antony, Edwin played Brutus, and Junius played Cassius. It was a benefit performance, and the only time that the three brothers appeared together on the same stage. The funds were used to erect a statue of William Shakespeare that still stands in Central Park just south of the Promenade. Immediately afterwards, Edwin Booth began a production of Hamlet on the same stage, which came to be known as the "hundred nights Hamlet", setting a record that lasted until John Barrymore broke the record in 1922, playing the title character for 101 performances.  From 1863 to 1867, Booth managed the Winter Garden Theatre in New York City, mostly staging Shakespearean tragedies. In 1863, he bought the Walnut Street Theatre in Philadelphia.  After John Wilkes Booth's assassination of President Lincoln in April 1865, the infamy associated with the Booth name forced Edwin Booth to abandon the stage for many months. Edwin, who had been feuding with John Wilkes before the assassination, disowned him afterward, refusing to have John's name spoken in his house. He made his return to the stage at the Winter Garden Theatre in January 1866, playing the title role in Hamlet, which would eventually become his signature role.

Answer this question "what did he perform in first"
output: Tressel or Tressil in Colley Cibber's version of Richard III in Boston in 1849.

Question: Bernard Mathew Leadon III (pronounced led-un; born July 19, 1947) is an American musician and songwriter, best known as a founding member of the Eagles. Prior to the Eagles, he was a member of three pioneering and highly influential country rock bands: Hearts & Flowers, Dillard & Clark, and the Flying Burrito Brothers. He is a multi-instrumentalist (guitar, banjo, mandolin, steel guitar, dobro) coming from a bluegrass background. He introduced elements of this music to a mainstream audience during his tenure with the Eagles.

Leadon was the last original member to join the Eagles, a band initially formed by guitarist/singer Glenn Frey, drummer/singer Don Henley, and former Poco bassist/singer Randy Meisner. Leadon is often credited with helping shape the band's early country-rock sound, bringing his strong sense of harmony as well as his country, bluegrass and acoustic sensibilities to the group. Instruments he played during his tenure in the band were electric guitar, B-Bender, acoustic guitar, banjo, mandolin, dobro and pedal steel guitar.  Upon the release of their debut album, Eagles, the group met with near instantaneous success, due largely to the strength of their hit singles, "Take It Easy", "Peaceful Easy Feeling" and "Witchy Woman" (co-written by Leadon and Henley), all of which highlighted Leadon's multi-instrumental talent on electric guitar, B-Bender, banjo, and harmony vocals. Their follow-up, Desperado, was another strong country-rock venture highlighted by the classics "Tequila Sunrise" and the title track. Leadon had a prominent role on the album, but it was met by surprisingly lukewarm reviews and lackluster sales. As a result, the band attempted to distance itself from the "country rock" label for their third album On the Border. In doing so, Leadon encouraged the group to recruit his old friend, guitarist Don Felder, to the band. The result was the guitar-heavy top ten hit "Already Gone". The album also included "My Man", Leadon's touching tribute to his old bandmate and friend, Gram Parsons, who had died of a drug overdose the year prior at Joshua Tree National Monument in southeastern California.  With the wild success of On the Border and its follow-up smash, One of These Nights, tension within the band grew, as Leadon grew increasingly frustrated by the band's direction away from his beloved country and bluegrass and toward album-oriented stadium rock. He famously quit the band in 1975 by pouring a beer over Glenn Frey's head. He later cited a need to get healthy and break the vicious cycle of touring, recording and heavy drug use that was rampant within the band.  Upon his departure, Asylum Records released Their Greatest Hits (1971-1975), which highlighted the band's Leadon years and went on to become the biggest-selling album of all time for sales in excess of 42 million units, awarded to the band members by the RIAA. He was replaced by former James Gang guitarist/singer, Joe Walsh.  Although it has long been believed that he left because he was dissatisfied with the band moving into rock and roll, Leadon denies it and said in 2013: "That's an oversimplification; it implies that I had no interest in rock or blues or anything but country rock. That's just not the case. I didn't just play Fender Telecaster. I played a Gibson Les Paul and I enjoyed rock & roll. That's evident from the early albums."

Using a quote from the above article, answer the following question: What year did the group form?
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