This paper explores the relationship between Joseph Banks, president of the Royal Society, and Charles Blagden, secretary to Banks and the Society between 1784 and 1797. Blagden is often referred to as one of Banks's key assistants, as a trusted adviser, collaborator and source of information. Yet, despite his significance, the nature of Blagden's association with Banks has not been explored in detail. This paper traces the development of their sometimes tumultuous relationship, exposing it as one in which Blagden, an aspiring gentleman, sought Banks's patronage to further his career and social ambitions. Key to Blagden's strategy was his role as a source of information for Banks from Paris. Yet, while Blagden pursued patronage with Banks in London, on visits to Paris he encountered a situation where merit, in terms of published scientific outputs, determined one's membership of the scientific community. Exploration of these conflicting cultures of advancement—patronage versus advancement through merit—here informs a re-assessment of scientific exchange at a key moment in Blagden's career, the 1783 ‘water controversy’. The limitations of Banks's patronage for ambitious clients are also explored, in the context of a rupture in the relationship between Blagden and Banks at the end of the 1780s.

This paper examines the diary of Charles Blagden, physician and secretary of the Royal Society between 1784 and 1797. It argues that the form and content of Blagden's diary developed in response to manuscript genres from a variety of contexts, including the medical training that Blagden undertook at the start of his career, the genre of the commonplace book, and contemporary travel narratives. Blagden was interested in the workings of memory and in the association of ideas. This paper reveals the diary's nature as an aid to memory and an information management tool. It argues that the diary assisted Blagden's attempts to secure the patronage of key figures in the eighteenth-century scientific world, including Joseph Banks, the Royal Society and a London-based network of aristocratic women. In exploring the development of the diary, the paper uncovers the role of a material object in aiding the management of patronage relationships central to the career of a significant but little-studied secretary of the Royal Society.

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