Old route of darjeeing mail , before indepence..
Make some correction..
OLD route is SEALDAH - NAIHATI-RANAGHAT jn- GADE /{ DARSHANA - CHUWADANGA - PORADAH Jn - sararpul - ISHWARDI Jn- NATORE - SANTAHAR -HILI HAKIMPUR - PARBATIPUR Jn - DOMAR} / HALDIBARI - JALPAIGURI TOWN - SILIGURI Jn.
The brackted route is now in bengladesh.