Sigh! The last set of WDS-4 class diesel-hydraulic locomotives with vintage side-rods are lined up for scrap at Bandra in Mumbai last week. Only a few remain now. The first of the WDS-4 class engines was built in 1968 (numbered 19057 was named Indraprastha and had been homed at Shakurbasti shed, Delhi, for a long time. At Mumbai, they were lovingly called Pappu by the railway staff.