Around 1905 Villa-Lobos started explorations of Brazil's "dark interior", absorbing the native Brazilian musical culture. Serious doubt has been cast on some of Villa-Lobos's tales of the decade or so he spent on these expeditions, and about his capture and near escape from cannibals, with some believing them to be fabrications or wildly embellished romanticism. After this period, he gave up any idea of conventional training and instead absorbed the musical influences of Brazil's indigenous cultures, themselves based on Portuguese and African, as well as American Indian elements. His earliest compositions were the result of improvisations on the classical guitar from this period.