1. IOR/V/18/268 Reference (shelfmark): IOR/V/18/268 Title: Meteorological Observations made at the East India Company's Observatory at Madras, 1841 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1841 Extent: 1 volume
2. IOR/V/18/268-277 Reference (shelfmark): IOR/V/18/268-277 Title: Meteorological Observations made at the East India Company's Observatory at Madras, 1841 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1841-1890 Extent: 10 volumes