One day accidentally a woodcutter’s axe fell on the bushes grown around the ant hill. With the passage of time a huge anthill grew over him and he was lost to the outside world.
In the Samadhi state He remained for about three hundred years. As per the most popular belief, Shri Narasimha Swami, after helping and spiritually uplifting a large number of people over a few decades, went away to the Himalayas for penance and went into Samadhi. The 'Guru Charitra' one of the most famous books gives lot of information about Him. Shri Narasimha Saraswati, about four centuries before the advent of Swami Samarth is believed to be the earlier incarnation of Shri Dattatreya.
Yet it does not really matter for those who have faith in Him and continue to experience his benevolence in different ways. For that matter, even Shri Shirdi Sai Baba's advent and early life has not been established. The early life of Swami Samarth like that of Shri Shirdi Sai Baba is shrouded with mystery. He stayed at Ganagapur (Karnataka State, Southern India) for a long time and then gave his "Nirguna Padukas" to his disciples and devotees, before leaving for the Kardali forests to perform Tapas. The biography of Shrimad Nrusimha Saraswati in "Shree Gurucharitra", gives us the details of his work in guiding the devotees and the various miracles he performed to help the devotees. Although not much is known about Shri Shripad Shrivallabha, the life story of Shri Narasimha Saraswati is well documented. Shri Swami Samartha is believed to be the incarnation of Shri Narasimha Saraswati, who in turn is the believed incarnation of Shri Shripad Shrivallabha.