Those into the ancient history of the Indian Railways would probably be aware of the old annual reports, some of which are available for download from archive.org and https://dspace.gipe.ac.in/xmlui/handle/10973/2
Some of the earlier reports, such of those of 1868-69, give a complete list of stations existing at this time. Here we see the stations of the BBCI and GIP adjacent to Bombay.
Note the weird spellings.
Those who are really interested should be able to locate this document from the GIPE link above. I may put up a few more pages shortly.