27 August 2025
The British Library as a Global Archive
Thiago Nascimento Krause is a 2025 Eccles Institute Visiting Fellow based at Wayne State University.
Black and white picture of Add. Mss. 14,037, fl. 10, 14 August 1645: an English plan to export enslaved people from Madagascar to Bahia de Todos os Santos, then the Brazilian colonial capital.
Why is time at the British Library indispensable for a historian tracing colonial Brazil’s entanglements with the wider world? English commercial and imperial expansion from the late sixteenth century tied Britain to much of the globe, including regions where it had neither a permanent presence nor direct trade.
Like many national libraries, but on a far larger scale given its age, resources, and location, the British Library has accrued tens of thousands of disparate documents from around the world through donations and acquisitions. The result is a collection that rewards specialists in almost any period, place, or topic.
Before receiving an Eccles Visiting Fellowship, I had spent only one day at the Library, but I arrived with extensive notes from trawling the catalogue before the late-2023 cyberattack. I also combed through older catalogues—most now digitized—both general listings and those focused on Portuguese and Brazilian materials. The footnotes of earlier historians supplied further trails to follow.
I have consulted roughly a hundred early modern manuscript volumes, each with hundreds of folios, so it is impossible to offer a full panorama of the riches held in the Library’s vaults. As one would expect, private papers of English statesmen abound, and the files of diplomats in Lisbon are especially valuable as complements to State Papers 89 (Portugal) at The National Archives, Kew. They track Brazilian trade and English attempts to enter it, as in Francis Parry’s report of 14/24 May 1678 (Add. MS 34,333, f. 59), and Lord Tyrawly’s letter of 17 November 1738 seeking authorization for the Royal African Company to supply enslaved Africans to Brazil in hopes of reviving the company’s fortunes (Add. MS 23,629, ff. 11–11v).
There are also manifold collections of assorted public and private papers, gathered for reasons now obscure yet often invaluable to historians. Some relating to the English Caribbean matter to Brazilianists. Mid-seventeenth-century planters from Barbados complained about Brazilian competition (Add. MS 14,111, ff. 9–10v), revealing the interconnected nature of Atlantic markets. Seventy years later, Jamaican planters and merchants petitioned for a tax break because the price of enslaved Africans had risen with heightened Brazilian demand (Add. MS 22,676, ff. 75–76), showing that the competition now happened in another, even grimmer sphere.
British acquisitiveness appears as well in volumes of Iberian documents, both state and private. A few volumes from the library of the fiercely anti-British Portuguese statesman the Marquis of Pombal seem to have found their way into the collection, such as Egerton MS 529, which contains valuable data on Portuguese trade in the mid-eighteenth century. Pombal would have been disgusted; this historian is grateful and urges other Iberian historians to further explore the wonders of the British Library.
The British Library's collections demonstrate how global historical research often requires looking beyond obvious geographical boundaries. For historians of colonial Brazil, London offers an indispensable complement to traditional Portuguese and Brazilian archives, revealing the global networks that shaped Brazil's colonial experience. My fellowship confirmed that understanding Brazil's past requires examining it through multiple imperial and commercial lenses—many of which are preserved in the British Library's remarkable collections.
Slavery is a steady, often silent presence in many of these papers. The mass enslavement of Africans and Indigenous peoples to produce sugar and tobacco, and to mine gold and diamonds, made Brazil valuable. The enslaved themselves are largely voiceless in sources centered on trade and diplomacy. To hear them, the historian must look elsewhere.