The music presented at these concerts shows his coming to terms with the conflicting elements in his experience, and overcoming a crisis of identity, as to whether European or Brazilian music would dominate his style. This was decided by 1916, the year in which he composed the symphonic poems "Amazonas" and "Tédio de alvorada", the first version of what would become "Uirapurú" (although "Amazonas" was not performed until 1929, and "Uirapurú" was only completed in 1934 and first performed in 1935). These works drew from native Brazilian legends and the use of "primitive" folk material.