A concession was granted 1894-98 to Sir W B Hudson, under branch line terms, for a line from Bhagalpur via Bausi to Ahmadpur, with a branch to Baidyanath. The survey had been made and estimates prepared, a further survey was being undertaken for a more direct route between Bausi and Baidyanath. 
This line was dismantled in 1917-18 for reasons unknown. The 1918 Administration Report page 59 note 'h' reports this as a "decrease of 31.55 miles due to dismantling of the Bhagalpur to Mandar Hill of the Bhagalpur Bausi Railway" .
Mandar Hill Railway Stration and Bausi Town are only 1 mile(1.6km) separated, they are clearly the same location.
There is no evidence to show any extension of the line that was constructed from Mandar Hill/Bausi to Baidyanath or Ahmadpur.
- “Summary of the principal measures of the viceroyalty of the Earl of Elgin in the Public Works Department Jan 1894 to Dec 1898” page 21, para 81, pdf34); Retrieved 2 Feb 2019
- "Symphony of Progress; The Saga of Eastern Railway, 1854-2003", page 22 by Pradeep Kumar and Soumitra Majumdar. Published by Eastern Railways, Kolkata, 2003
- “Administration Report on Railways 1918” pages 59 (pdf67); Retrieved 2 Feb 2019