[4] His elder brother, Charles (1785–1846), was Resident to the Mughal Emperor's court, and briefly the provisional Governor General of Bengal (1835–36).

[8][9] During the rainy season he used to stay at 'Dilkusha' (Delight of the Heart), which was built on the first floor of the tomb of Mohammed Quli Khan, brother of Adham Khan, general of Mughal Emperor, Akbar, situated south east of the Qutb complex in Mehrauli, an area which was also the traditional retreat of the Mughals for the season.

[14] During the Indian Rebellion of 1857, the Metcalfe House was sacked by the Gurjar villagers from whom the land was bought to erect the building.

[15] His father was Sir Thomas Theophilus Metcalfe, 1st Baronet and his mother was Susannah Sophia Selina Debonnaire.

He was succeeded in his title by his eldest son, Sir Theophilus John Metcalfe, 5th Baronet, who was also in the Indian Civil Service.

His doctors believed that the ailment was caused by poison, since the symptoms were similar to those seen in certain "inconvenient" high ranking members of the Mughal royal family such as Mirza Fakhru who was a friend of Metcalfe.