*The Observatory at Delhi; by Thomas and William Daniell, 1808* (BL);
also: *The Observatory at Delhi (another view)* [*Daniells1808b*]

The Jantar Mantar in Delhi, a painting done in the 1840's; *more information (BL)*

Source: The Golden Calm: An English Lady's Life in Moghul Delhi (Reminiscences by Emily, Lady Clive Bayley, and by her father, Sir Thomas Metcalfe), ed. M. M. Kaye (New York: Viking Press, 1980), p. 36. CU scan, Dec. 2000.

*[Ruins of the] Observatory, Delhi; a photo by John Murray, 1858* (BL)

*'Janter Manter'. The Observatory, Delhi, Punjab; a photo by Samuel Bourne, 1860's* (BL)

A photograph by Lala Deen Dayal, c.1880's

Source: ebay, Aug. 2005