Bibliography:

• James Dunlop, 1828. A Catalogue of Nebulae and Clusters of Stars in the Southern Hemisphere observed in New South Wales. Philosophical Transactions of the Royal Society, Vol. 118, p. 113-151

• James Dunlop images, NGC/IC observers page

• Glen Cozens and Graeme L. White, 2001. James Dunlop: Messier of the Southern Sky. Sky & Telescope, Vol. 101, No. 6 (June 2001), p. 112-116.
• Glen Cozens, 2008. An analysis of the first three catalogues of southern star clusters and nebulae. PhD thesis, James Cook University, 2008, 362 + xxi pages (June 2008) [ADS: 2008PhDT.......336C]
• Glen Cozens, Andrew Walsh, and Wayne Orchiston, 2010. James Dunlop's historical catalogue of southern nebulae and clusters. Journal of Astronomical History and Heritage, Vol. 13, No. 1, pp. 59 - 73 (March 2010) [ADS: 2010JAHH...13...59C].