Marshall G. Hall is a retired UK university professor of Socio-anthropology who has held a lifelong interest in travel, architecture, linguistics, and adventure. Having written for academia for years, today Marshall writes, teaches the occasional university class as a guest lecturer, and does public speaking. In 2021, Marshall published Historic Bridges of Buckinghamshire for Windgather Press, and in 2022, Medieval Bridges of Southern England: 100 Bridges, 1000 Years was published, which was the first of a three-volume series on medieval bridges of England.