Italian musicologist Vincenzo Caporaletti has shown, how the authorial self-attributions of Jelly Roll Morton are not reliable, by means of an analysis conducted on the first complete transcription in musical notation of Morton's Library of Congress performances (1938) with conclusions defined by Bruce Boyd Raeburn “justifiably compelling” on a scientific level. Furthermore, Caporaletti has accurately identified the ‘floating folk strains’ that Nick La Rocca assembled to create ‘Tiger Rag’. The song was known as "Jack Carey" by the black musicians of the city. It was compiled when Jack's brother Thomas, 'Papa Mutt', pulled the first strain from a book of quadrilles. The band evolved the second and third strains in order to show off the clarinetist, George Boyd, and the final strain ('Hold that tiger' section) was worked out by Jack, a trombonist, and the cornet player, Punch Miller." Other recordings After the success of the Original Dixieland Jass Band recordings, the song gained national popularity. Dance band and march orchestrations were published. Hundreds of recordings appeared in the late 1910s and through the 1920s. These include the New Orleans Rhythm Kings version with a clarinet solo by Leon Roppolo. Archaeologist Sylvanus Morley played it repeatedly on his wind up phonograph while exploring the ruins of Chichen Itza in the 1920s. With the arrival of sound films, it appeared on soundtracks to movies and cartoons when energetic music was needed. "Tiger Rag" had over 136 versions by 1942. Musicians who played it included Art Tatum, Benny Goodman, Frank Sinatra (in a version with lyrics), Duke Ellington, Bix Beiderbecke, and Louis Armstrong, who released the song at least three times as a 78 single, twice for Okeh in 1930 and 1932, and for the French arm of Brunswick in 1934. A Japanese version was recorded in 1935 by Nakano Tadaharu and the Columbia Rhythm Boys. The Mills Brothers became a national sensation with their million-selling version in 1931. In the same year the Washboard Rhythm Kings released a version that was cited as an influence on rock and roll. During the early 1930s "Tiger Rag" became a standard show-off piece for big band arrangers and soloists in the UK, where Bert Ambrose, Jack Hylton, Lew Stone, Billy Cotton, Jack Payne, and Ray Noble recorded it. But the song declined in popularity during the swing era, as it had become something of a cliché. Les Paul and Mary Ford had a hit