The genre at the center of this essay—the Anglophone transmasculinity narrative in the long eighteenth century—was a popular and ubiquitous genre for imagining gender transformation and queer relations to sex, desire, and embodiment. I argue that the transmasculine figure was a crucial one for imagining transatlantic biopolitics, often embodying aspects of transformability long associated specifically with white masculinity in a settler colony. Thus, the genre is arguably more representative for the history of whiteness than it is for the history of either queer or trans imaginative or embodied life in the eighteenth-century Atlantic world. However, it offers a compelling case study of a genre that can seem spectacularly hyperlegible for contemporary identification. These texts show how sexuality and gender came to be narrative genres in a print/public sphere with privileged relations to intertwined origin stories of the nation, American literary history, and modern queer/trans identities—and a very useful case study in the limits of looking for queer/trans representation in the genres that seem most readily assimilable into a legible prehistory of “queer American literature.”