Mandra Bhaun Railway
"Managed, maintained and worked by NWR as if it were part of its system". 
The line of 46 miles (74 km) and conveyed passengers, goods and ore from this mineral rich area.
It was transferred to Pakistan on partition in 1947 and since been abandoned and dismantled.
Refer to FIBIS Fact File #4: “Research sources for Indian Railways, 1845-1947” - available from the Fibis shop. This Fact File contains invaluable advice on 'Researching ancestors in the UK records of Indian Railways' with particular reference to the India Office Records (IOR) held at the British Library
An on-line search of the IOR records relating to this railway  gives the following: -
- L/F/8/18/1384 “ Mandra-Bhon Railway, Indenture; 1914" (Note spelling error in Catalogue - Bhaun is correct, not Bhon)