He was descended on his father's side from a family which had resided in Temple parish for nearly two centuries; his mother, whose maiden name was Perkins, came from Monmouthshire, and he died seised of estates in that county which had belonged to his maternal ancestors for many hundred years.
His eldest daughter, Cæcilia, married 9 February 1796 to William Brame Elwyn, barrister-at-law and recorder of Deal, had died before her parents, 3 June 1811, aged 34.
He left a translation of part of Athenæus, which, under the title of "Collections from the Deipnosophists, or Banquet of the Gods", was announced for publication in the Gentleman's Magazine for January 1813.
Eagles contributed to a periodical essay which appeared on the fourth page of Felix Farley's Bristol Journal, with the title of "The Crier".
One of his many acts of quiet benevolence has been beautifully commemorated by his son in an essay, "The Beggar's Legacy", contributed to Blackwood's Magazine in March 1855.