The later career of British prehistorian Peggy Piggott, latterly Guido, is evaluated in this article, in a bid to further develop our understanding of women's participation in twentieth-century British archaeology. After WWII, when her husband Stuart Piggott was appointed to the Abercromby Chair in Edinburgh, she worked to assist his role. By the early 1950s, she had co-directed and published eight hillfort excavations, advancing our understanding of prehistoric architecture before the advent of radiocarbon dating. The authors consider Peggy Piggott's contribution as a fieldworker, promoting open-area excavation and influencing the next generation. We also consider her thinking, as an early advocate for continuity and Childe's diffusionism, in contrast to the invasionist views of Christopher Hawkes and Stuart Piggott. The authors reflect on the role her marriage played in enabling and restricting her career, her work in 1960s Italy, her expertise in ancient glass beads, and her activity in retirement.