It is interesting to match the footnotes with clusters and nebulae, for example when Dunlop made this star catalogue,
[1] he noted that star 3807 was a “fine blue star,” but he did not know it was a planetary nebula. Herschel recognised this to be a blue planetary nebula (NGC 3918) he had observed, according to his 1835 letter to Maclear.
[2]
[1] Richardson, A Catalogue of 7385 Stars, chiefly in the Southern Hemisphere prepared from observations made in the years 1822, 1823, 1824, 1825 and 1826 at the observatory at Paramatta (with one r), New South Wales, founded by Lieutenant General Sir Thomas Makdougall Brisbane.
[2] B. & N. Warner, Maclear & Herschel Letters & Diaries at the Cape of Good Hope 1834-1838, Cape Town, 1984, p. 108.