This letter was an acknowledgement for the comet plate and dicussing to compare with the existing plates.

The item comprises observations made as Madras Equatorial Observations of Comet II; its observations were taken in July 1861 by N.R. Pogson.

The item comprises observations made as Madras Equatorial Observations of the 1882 comet; its observations were taken from September to November 1882 by N.R. Pogson. The Great Comet of 1882, formally designated C/1882 R1, 1882 II, and 1882b, was a comet that became very bright in September 1882.

The item comprises observations made as Madras Equatorial Observations of an unknown Comet; its observations were taken on 22 January 1884 by N.R. Pogson.

This fond consist of the newspaper clippings on the coverage related to Halley comet.

This item was about the observations of great September comet of 1882 made on 11th September 1882. Observed from Madras Observatory by N. R. Pogson.