I think when I read the Lockyear article he makes clear that the eclipse data from India was not used for his findings of Helium. Neither was the data from Jannsen nor from any other eclipse source. He said that all he needed was derived from his own data collected in his garden in London.  One book I mentioned above states for the 1868 eclipse one JPEC sponsored expedition made camp and an abandoned coastal fort the path of the eclipse is going over Vijaydurgand they only used places which were either reachable by train or had a harbour. This makes clear that even in 1868 it might be possible to have some English astronomers at the fort. The platform might be from the 1868 or 1898 expedition, but helium was neither discovered there nor was data used from this expedition for the discovery.