Treaties between Native Nations and British colonial governments in eighteenth-century North America were created and sustained through renewals of ongoing relationships such as the Covenant Chain and Chain of Friendship alliances. These negotiations produced speech acts and material artefacts that affirmed and embodied the agreements and alliances that bound nations together. My thesis seeks to explore the material cultures of diplomacy in the western borderlands, mapping the communications networks and nodes that fuelled their movement and engagement. Focusing specifically upon how and on whose terms diplomatic information traversed this landscape, this work charts how legal debates and epistemologies were pushed and pulled from treaty councils to, for example, the pages of the London Gazette, the streets of Philadelphia, and the City Hall in Albany. Following in the path of scholars who have emphasised that politics in early America was spatially determined, this study will consider how to locate Indigenous sovereignty and legal hybridity within communication networks and nodes. In doing so, this thesis proposes that individuals’ engagements with hybrid languages of diplomacy—print, manuscript, and wampum, for example—enabled an interconnected and variegated legal landscape.