Elizabeth Bryan Vardon (née Tarbutt; 1780–1859): Daughter of the London merchant George Tarbutt. In 1797 she married Thomas Vardon. They had six children, including Thomas Vardon (1799–1867; DNB), Librarian of the House of Commons. Her sister, Caroline Forsyth Tarbutt, married Southey’s old Oxford friend George Maule (d. 1851) in 1810.

Elizabeth Tyler (1739–1821): The older, unmarried half-sister of Southey’s mother. She had spent her early life looking after an elderly relative and on his death received an inheritance which she then spent on living the high life. Her extravagance was a source of great concern to her relatives, in particular her half-brother Herbert Hill. Elizabeth Tyler was painted by Joshua Reynolds and moved in cultural circles in Bath and Bristol, counting amongst her friends the Palmers, owners of the Theatre Royal, Bath.

Sharon Turner (1768–1847): Lawyer and historian who lived at Red Lion square near the British Museum and used the manuscripts thus accessible to him to compile a History of the Anglo-Saxons, 4 vols (1799–1805), on which Southey drew in Madoc (1805). A long term friend and correspondent of Southey, in 1817 Turner gave him legal advice over the Wat Tyler piracy.

Dawson Turner (1775–1858): Banker, botanist and antiquary. He was born and spent most of his adult life in Great Yarmouth, Norfolk. Educated in Norfolk and at Pembroke College, Cambridge, Turner married Mary Palgrave (1774–1850) in 1796, the same year he joined the family bank, Gurney and Turner. He used his wealth and leisure time to pursue interests in botany, antiquities, painting and collecting art, books and manuscripts, accumulating over 8,000 volumes. He published on a number of subjects, including botany, travel, architecture and antiquities.

John Furnall Tuffin (d. 1820): Wealthy vintner of Great Queen Street, London, an acquaintance of John Horne Tooke, Joseph Watt, William Godwin, and the Wordsworths. His fame as a conversationalist led to him gaining the nickname ‘River’. Southey’s correspondence with him does not appear to have survived.

Treuttel and Wurtz: French firm of publishers and booksellers, founded by John-Georges Treuttel (1744–1826) and John-Godefroy Wurtz (1768–1841) in Strasbourg; they opened a branch in Paris in 1795 and a London branch was set up in 1817 under the management of Adolphus Richter (d. 1857), based at 30 Soho Square. They specialised in importing books from continental Europe. From 1827 they published a new journal, the Foreign Quarterly Review; Southey contributed to the first issue.

James Webbe Tobin (1767–1814): Abolitionist son of a Nevis sugar planter, Tobin became friends with Coleridge and Wordsworth, whom he may have visited in 1797 in Somerset. In Bristol he befriended Humphry Davy and participated in the nitrous oxide experiments at Thomas Beddoes’s Pneumatic Institution. A prospective Pantisocrat, Tobin later contributed five poems to the second volume of Southey’s Annual Anthology and urged Southey to produce a third.

Samuel Tillbrook (1784–1835): Anglican clergyman, Fellow of Peterhouse, Cambridge, 1810–1828, and later Rector of Freckenham, Suffolk, 1829–1835. Tillbrook was on good terms with Wordsworth, near whose home at Rydal he purchased a cottage, the ‘Ivy Cot’. Southey corresponded with him over a number of charitable projects, including plans to help James Dusautoy and Robert Bloomfield. Tillbrook also published an extended critique of Southey’s use of hexameters in A Vision of Judgement (1821).

Richard William Tighe (1744–1828): A member of the Tighe family of Rossanna, County Wicklow, and uncle of the poet Mary Tighe (1772–1810; DNB). He was the author of Psalms and Hymns (1789) and of other sermons and religious tracts. In 1821 he sent Southey a copy of his biography of the devotional writer and non-juror William Law (1686–1761; DNB).

George Ticknor (1791–1871): Writer, first Professor of Modern Languages at Harvard, and co-founder of the Boston Public Library. Born in Boston, he was educated at Dartmouth College and later studied for the Massachusetts Bar. Finding the law uncongenial, he decided to pursue his studies and visited Europe from 1815 to 1819, for some of this time accompanied by his friend Edward Everett. The two enrolled at the University of Göttingen; while there Ticknor was offered a newly created chair in French and Spanish at Harvard.