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.

William Thorp (1727–1800): Well-known hosier in Oxford, with a shop in Broad Street; Mayor of Oxford, 1775–6 and 1789–90. Thorp and his son and namesake, William Thorp (1762–1835), Vicar of Sandfield, 1807–35, were friends of Southey’s during his time at Oxford.

Thomas Thompson (1776–1861): Pharmaceutical and manufacturing chemist at Liverpool. He was a leading Quaker and corresponded with Southey in 1820–1821 about the latter’s proposed (but unrealised) life of George Fox (1624–1691: DNB), the founder of Quakerism.

William Bowyer Thomas (d. 1802): A native of Hereford, Thomas was the business agent for Herbert Hill, Southey’s uncle. His job also involved him in the tangled finances of Elizabeth Tyler, Hill’s half-sister and Southey’s aunt. Thomas met Southey during the latter’s 1795–1796 visit to Portugal. Southey stayed with him in Hereford in 1798 and through Thomas gained access to the cathedral library. In 1800 Thomas married a cousin, a woman Southey greatly admired. Thomas died suddenly in 1802.

Dr Thomas (first name and dates unknown): A native of Hereford, father of William Bowyer Thomas. He was involved in the management of Herbert Hill’s business affairs.

John Thelwall (1764–1834): Political radical, poet and erstwhile friend of Coleridge. Arrested on a charge of treason in 1794, Thelwall became first a farmer at Llyswen, Wales, then a speech therapist, journalist and itinerant lecturer on elocution. He remained a Radical but faded from the forefront of the political scene after the 1790s. Though they came to disagree on politics, Southey retained a good deal of affection for Thelwall.

Thomas Telford (1757–1834): Civil engineer and architect. The son of a shepherd from Eskdale, Dumfriesshire, he was apprenticed to a stonemason at the age of fourteen and taught himself how to design and manage building projects. Telford made his name as Surveyor of Public Works in Shropshire, where he built the Pontcysyllte Aqueduct over the River Dee (1805).