Pollen analyses have been made from three parts of a New Forest valley bog system, Hampshire, England. The wide valleys excavated in the preceding Full-glacial or Late-glacial time were shown to be filled by organic deposits accumulated rapidly during the Pre-boreal and Boreal periods. Pinus is shown to have been strongly dominant throughout this time, and the sub-zones a, b and c of pollen zone VI are clearly and characteristically displayed. The beech (Fagus sylvatica) is shown to have been present already in the Boreal period. These results conform with those already reported from southern England. Although at the site there is evidence of the persistence of open habitat plants of the Late-glacial into the early Post-glacial, thereafter the record is one of closed woodland. Deposits later than early zone VII (Atlantic) are not present.