Thomas Thornton's diary and notes from lectures and towards an essay, probably whilst studying law at Edinburgh University 1847-1849; personal account books of J.J. Thow, Edinburgh and possibly of T.D. Thow [brother] of J.J. Thow 1850-1851; inventory and valuation of stock of James Cargill, draper, Arbroath 1854; Laws and regulations of the Carnoustie Co-operative Association 1860; minutes and accounts for Mrs Lillias Currance or Ogilvies Mortification for Old Men 1862-1911; regulations and bye-laws of Dundee Lunatic Asylum 1866; valuation of mill property belonging to the Trust Estate of Thomas Meldrum Henry, Flaxspinner, Kirkcaldy 1879; papers re. patents, vehicle brakes, Dundee Carriage Co and Anglo-French Motor Carriage Co Ltd 1896-1916; report to the Water Committee of Arbroath Town Council on the Burgh water supply 1896; Papers re. St Joseph's Industrial School 1909-1910; advertisements for John Thornton, draper, Forfar,  and 'Arctic' Cold Storage Machine 1900-1903. These papers were kept on behalf of their clients by Thomas Thornton, Son & Co in the course of their practice as solicitors.
Street Road accounts 1836-1837; Scottish Widows' Fund Life Assurance Society: report of the procedure at the 35th Annual General Court 1849; papers re. actions between George Horsley and Matthew Henry Horsley, owners of the ship 'SS Hesper' of West Hartlepool, against Baxter Brothers, Dundee, 1892 and J. & A.D. Grimond, Dundee, and others 1892-1894; James Howieson and Peter Talbert, sheepfarmers, against David Ross 1893-1894; William Scott Taylor against David Forrester 1895; liquidation of London and Montrose Shipbuilding and Engineering Co Ltd 1895-1897; Eben Thomas & Co, Importers, Liverpool, against Messrs Rattray & Munro, Ham Curers and Sausagemakers, Dundee 1896-1897; dispute over the initiation of Jack Johnson, "the well known pugilist", as a member of the Masonic lodge Forfar and Kincardine; papers relating to Blairgowrie Water Supply 1905-1906; papers re. tram services in Dundee; specification for Brick and Mason work for proposed saw shed on Dundee Harbour eastern wharf 1896; printed copies of Acts re. Public Libraries 1887-1894. These papers were kept on behalf of their clients by Thomas Thornton, Son & Co in the course of their practice as solicitors.
Papers relating to plans in the Thornton Collection, including books of references, sales particulars, terriers, schedules and correspondence 1843-1918. These papers were kept on behalf of their clients by Thomas Thornton, Son & Co in the course of their practice as solicitors.
Maps and plan, mainly of Dundee, Angus, Perthshire; subjects include property, railways, water supplies, harbours, River Tay, roads, estates, Ordnance Survey c.1771-1940. These plans were kept on behalf of their clients by Thomas Thornton, Son & Co in the course of their practice as solicitors.
Inventories and valuations of furniture etc., in Thornton Castle, Laurencekirk belonging to Mrs Thornton and Miss Scott and 13 plans of buildings belonging to the Thornton Estate surveyed by Northern Assurance Co Ltd. Thornton Castle, near Laurencekirk in the parish of Marykirk, Kincardineshire is known to date back to at least 1531. It was an ancient seat of the Strachan family. The property was acquired by Alexander Crombie, an advocate and land agent, in 1804, was considerably refurbished in the following years, and was later owned by Sir Thomas Thornton.
Title deeds of Feddinch and Cairnsbank in the regality and barony of St. Andrews, Cairns and other lands in the barony of Strathmiglo, Fife and lands in Dundee 1518-1784; chartularies of Ferryden, in the parish of Craig, [Angus] 1795-1837; legal papers relating to various properties in Dundee 1874-1877. These papers were kept on behalf of their clients by Thomas Thornton, Son & Co in the course of their practice as solicitors.