Wessex Archaeology was appointed by RPS Planning and Development on behalf of E.ON, to carry out an archaeological watching brief during geotechnical works on land at Kemsley Paper Mill, Sittingbourne, Kent. The watching brief forms part of a continuing programme of geotechnical site investigations on the Site. The Site lies on the edge of the tidal water courses of The Swale and Milton Creek, immediately north-east of the existing paper mill, within Kemsley Marshes. This type of habitat increases the potential for the recovery of deposits associated with river exploitation (e.g. hunting, transportation and settlement) and management (e.g. flood defences and crossing sites) from the prehistoric period onwards. The watching brief comprised the excavation of nine trial pits and eight window samples, under constant archaeological supervision. Evidence for buried topsoil was encountered within WS10 at a depth of 4.6m below ground level but no features, deposits or artefacts of archaeological or palaeoenvironmental significance were encountered within the trial pits or window samples. No further work is recommended.