Report on 1983-5 excavation of a low-lying gravel site close to the Thames. A mid Iron Age ditched enclosure with four huts, and evidence suggesting horse-breeding rather than arable cultivation is followed, after a break, by Roman period enclosures that initially respect the earlier ditches but later become rectangular; no structures but R-B domestic refuse up to mid 4th century. Later use in Middle Ages. Discussion of the site, finds and environment with all data in readable print; no fiche. Stunning reconstruction on front cover.