Complex sentence: After staying for some years one day both the sisters disappeared suddenly from the house of Basu Praharaj and according to the account of the villagers both the sisters traveled up to the Tarini Parvat/Ratnagiri and disappeared there.
Split into simpler sentences: After staying for some years, both sisters disappeared suddenly from the house of Basu Praharaj. According to the account of the villagers both the sisters traveled up to the Tarini Parvat/Ratnagiri and disappeared there.