A forgotten archive at Oxford, the working library of Mark Wilks (1759-1831), sometime Resident of Madras who wrote the influential Historical Sketches of the South of India (1810), offers evidence of Anglo-Indian collaboration in the early colonial period following the 1799 defeat of Tipu Sultan. Examining new manuscript evidence, this article shows how Wilks, a friend of Colin Mackenzie, the surveyor of Mysore, used texts from the vast Mackenzie Collection to compose his history, abstracting selected translations for his own library. Wilks had the help of Mackenzie's assistants, in particular Kavali Venkata Lakshmayya. Lakshmayya (and others) provided Wilks with translations of land grants and genealogical narratives, both of which were used to establish historical chronology. Because the British saw themselves as restorers of ancient Indian practices, chronology was as important for public policy as for historiography. Working with Wilks, Lakshmayya compiled a large manuscript folio that was at once a table to convert dates among western, Islamic, and Indian calendars, and a historical abstract giving a timeline of key events. This and other manuscripts show Wilks's use of the Mackenzie Collection beyond only inscriptions. Historical chronology was established through a mix of sources: inscriptions, narrative accounts, and published works. Moreover, Wilks incorporated narratives written by native interpreters into Historical Sketches. Indian history was the result of Anglo-Indian collaboration. Native interpreters contributed significant intellectual labour, and their historiographical work laid the foundation for the writing of the early history of South India.***Mark Wilks, born at Kirk Michael Vicarage, was the son of Revd James Wilks and his second wife Elizabeth Christian. He was named after his godfather, Bishop Hildesley. Receiving a good education, Wilks obtained a cadetship in 1781 and by 1782 received a commission in the Madras army of the EIC. From the early seventeenth century onwards the EIC had a presence in India, gradually increasing influence over the ensuing centuries (EIC's rule was officially recognised in 1764). As British control expanded, so too did Indian opposition. This led to a period of great political conflict and wars (such as the Anglo-Indian Wars) and many soldiers like Wilks were needed.In 1788 Wilks was appointed fort adjutant at Fort St George, Madras (now Chennai) and gained the promotion of lieutenant the following year. From 1790 to 1792 he acted as brigade-major and aide-de-camp to Colonel James Stuart (d.1793) during the war against the Mysore ruler, Tipu Sultan (1750-1799). By 1793 Wilks was made assistant adjutant-general. In 1793 Wilks married Harriet Macleane (c.1773-1806) at Fort St George; the couple had two children, including Lady Laura Buchan (1797-1888).Between 1795 and 1799 Mark was granted a leave of absence due to bad health. Returning to the Isle of Man he joined the Royal Manx Fencibles in 1797 as a lieutenant. During his absence Wilks received his captaincy in India and returned to the country in 1798, serving as military secretary and private secretary to the Governor of Madras, Edward Clive (1754-1839). Wilks was next appointed town-major of Fort St. George and from 1803 to 1808 he was political Resident at the Court of Mysore. Attaining the rank of major in 1804, Wilks then obtained lieutenant-colonel in 1808 (received the title of colonel in 1814).A further bout of ill-health saw Wilks on the Isle of Man from 1809 to 1811, during which he was elected a member of the House of Keys. 1812 saw his return to India however by 1813 he had resigned from his office and returned to the British Isles. 1813 also saw Wilks marry his second wife, Dorothy Taubman (b.1783) in Bath, Somerset. Dorothy was the daughter of John Taubman (1746-1822), Speaker of the House of Keys.