Elgar had by this time achieved only limited recognition. He and his wife moved to London, where he scarcely fared better in advancing his career. They couple eventually retreated to Worcester, Elgar suffering from bitter self-doubt and depression. Alice stood by him the entire time, her unfailing confidence restoring his spirits. He was further buoyed by the success of his Imperial March, Op. 32, which earned him a publisher and a vital friendship with August Jaeger, his editor and confidant. In 1899, Elgar composed one of his best-known works, the "Enigma" Variations, Op. 36, which catapulted him to fame. The work is a cryptic tribute to Alice and to the many friends who stood behind the composer in the shaky early days of his career. German conductor Hans Richter proclaimed it a masterpiece, and his performances of the work in Britain and Germany established the composer's lasting success.
Elgar's most fruitful period was the first decade of the twentieth century, during which he wrote some of his noblest, most expressive music, including the Symphony No. 1 in A flat major, Op. 55 (1907-1908), and the Violin Concerto in B minor, Op. 61 (1909-1910). His best-known works from this period, however, are the first four of his Pomp and Circumstance Marches (1901-1907); the first of these, subtitled "Land of Hope and Glory," became an unofficial second national anthem for the British Empire.
Elgar suffered a blow when Jaeger (the "Nimrod" of the "Enigma" Variations) died in 1909. The composer's productivity dropped, and the horrors of World War I deepened his melancholy outlook. His music became more intimate, even anguished; still, he wrote some of his best chamber music during this period, as well as the masterly Cello Concerto in E minor, Op. 85 (1919), whose deep feeling of sadness and impending loss surely relates to the final illness of his faithful Alice, who died in 1920.
For some time after that, he wrote little of significance but made a historic foray into the recording studios when new electrical recording processes were developed; the fortunate result was a number of masterly interpretations of his own orchestral music that have survived for posterity. In the early '30s, Elgar set to work on a third symphony, left unfinished at his death in 1934. The work was brought to a generally well-received realization by Anthony Payne in the late '90s and was subsequently recorded.