A series of environmental samples were taken during the 1981 excavations at Fiskerton Causeway. Some of the samples from this wetland site were examined, mainly for pollen and seeds, but there are also some results from beetle remains produced by Peter Osborne. There is a large wetland flora which is probably indicative of what was growing in the immediate surroundings of the site. A few dry land plants indicate open land and grassland. Others are indicative of scrub which seems to have replaced alder carr at about the same time that the site was used. The plant and insect evidence seems to agree with ideas that the site was used as a cattle droveway in connection with a crossing of the River Witham at that point.