This letter informs about sending John Evershed a diapositive of Mr.Woods's photograph of "Halley" of 1910 April 1921.

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 Comet Biela; its observations were taken in December 1872 by N.R. Pogson. Comet Biela (official designation: 3D/Biela) was a periodic Jupiter-family comet first recorded in 1772 by Montaigne and Messier and finally identified as periodic in 1826 by Wilhelm von Biela.

The item comprises observations made as Madras Equatorial Observations of Comet Encke; its observations were taken in August 1878 by N.R. Pogson. Encke's Comet (official designation: 2P/Encke) is a periodic comet that completes an orbit of the Sun once every 3.3 years.

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 item was about the French father named Richaud spotted the first comet in India in 1689 . He also made an important discovery of the double star Alpha Centauri in the southern skies using a telescope, marking the first use of a telescope in India. Additionally, he was the first to observe Halley's Comet.

This item was about the disappearance of Halley comet after having an interaction with our solar system has created a lot of public enthusiasm. The most awaited celestial visitor seemed to have left a lasting impact. Initial analysis of data collected at Kavalur and other observatories in India reveals that there was a constant change and a large amount of dust and molecules being ejected by the comet. The data collected by Indian and foreign observatories was expected to provide substantial in-depth knowledge of the fabled comet.

This item was about conditional change occured in situation of Halley Comet. Dr J C Bhattacharya, the director of IIA, has been confirmed that there is no possibility of any biological disturbance occurring due to Halley comet. He replied to a question stating that the celestial object seen very near Halley's Comet was not a meteor. He also assured that the institute will release a detailed study on the comet after completing a study of photographs and other research work. Additionally, he informed the public about the different ongoing projects of IIA.