Investigations into Mesolithic and Neolithic activity and environmental impact on the Cambridgeshire fen-edge are described, consisting of stratigraphic and pollen analytical research at Peacock's Farm, and trial excavations at Peacock's Farm and Letter F Farm. At Peacock's Farm, the bulk of archaeological occupation was found to be of Mesolithic date, around 8000 BP uncalibrated; minimal signs of Earlier Neolithic activity were recovered. At Letter F Farm there was mainly Earlier Neolithic occupation, around 5000 BP, but there had also been Mesolithic activity. Radiocarbon dating at Peacock's Farm shows that the Mesolithic black band within the peats flanking the sand ridge, first described by Clark et al. (1935), covers a surprisingly long period: over 1700 years, mainly between approximately 8500 and 6800 BP. Dates from Mesolithic occupation areas on the sand ridge coincide with the first half of this period. Consideration of the stratigraphic results, radiocarbon dates and two pollen diagrams suggests that a channel was eroded through the Mesolithic black band at an early stage of its formation, probably not long before 7500 BP. In one area infilling of the channel apparently took place in a number of stages; in another it filled progressively with shell muds. A tentative reconstruction of the sedimentary, environmental and archaeological sequence is made. Before the Mesolithic occupation the landscape appears to have been densely forested both on the wetland and the elevated sands. Minor damage to this cover took place around 8500 BP, coinciding with the beginning of the Mesolithic occupation. This was followed, at about 8250 BP, by a substantial opening of the forest cover, when the site may have been more actively used than before, possibly as part of a new settlement pattern. Relatively open local conditions persisted for some 700–1500 years before the forest cover was re-established. Regeneration may have involved alder as a colonist, coinciding with the classical Boreal-Atlantic transition of Godwin. The relative importance of human impact and the occurrence of a period of dry climate are discussed. The balance of evidence, some admittedly circumstantial, points to a pronounced human impact on the local environment in the Mesolithic period. Burning may have been connected with short-stay visits in a settlement pattern spanning both wetland and dry areas; the context for this apparent lowland change might be sought in the insulation of the British Isles in the 9th millennium BP and increased territoriality from that date as reflected in microlith styles. By contrast in the Neolithic period there is very little pollen evidence of local environmental damage at Peacock's Farm. The Neolithic archaeological evidence from Peacock's and Letter F Farms suggests small short-stay visits only, as part of a regionally now more differentiated settlement pattern.

Unretouched flakes, Clactonian notches, true notches and a unifacial chopper were all used in a series of experiments on staves of yew wood. The aim of the experiments was to see which of the various Clactonian tool types could best reproduce the sharp, straight-sided taper of the Clacton spear point. Because of the hardness of the wood the experimenter was forced to begin close to the end of the wooden staves. The unretouched flakes when used in an outward whittling motion tended to produce point profiles with rounded tips; these resemble the point of the Lehringen lance. The Clactonian notch, better suited to an inward scraping motion, reproduced the same profile as the Clacton spear point. The experiments were repeated on four softer woods than yew in order to see how far the nature of the raw material affected the results. Irrespective of the hardness of the wood, rapid inward scraping consistently produced a point profile resembling the Clacton spear point using both an unretouched flake and Clactonian notches. The sharp, straight-sided taper of the Clacton spear point is therefore interpreted as being a result of the motion and technique of manufacture. Observations were taken on the efficiency and best ways of using the various stone tools used in the experiments. The most efficient of the tool types used for replicating the profile of the Clacton spear point using rapid scraping in an inward motion was the Clactonian notch.

The clearance of White Castle, Gwent, in the late 1920s led to the discovery of an end-blown flute or flageolet in the moat (Megaw 1961). This was a metatarsal of red deer, pierced by five regularly spaced finger-holes, two rear thumb-holes, a sound and suspension-hole (pl. 35 a, b). Its association with medieval pottery suggested a 13th-century date which was supported by its scratch and dot engraving reminiscent of medieval examples from Bornholm and Wartburg (fig. 2). Megaw considered it to be one in a long tradition of block and duct flutes dating as far back as Avebury (1500 BC) and Malham Tarn (Iron Age).

Classification has been a fundamental tool in archaeology since the birth of the discipline, particularly in artefactual analysis. All artefacts, including field monuments, have a limitless variety of characteristics and their reduction into a system of classification necessitates the selection, summarization and simplification of those characteristics regarded as diagnostic in order to clarify groupings of related monuments which might otherwise be obscured by concentration on detail. While some doubt has been cast on the value of the classification of henge monuments as an internally coherent group (and the discovery of many more sites has certainly done little to consolidate that coherence) it can still be argued that a strictly defined class of henge is a useful contribution to our understanding (Harding 1987). Other classes of monument of the 3rd and 2nd millennia BC which seem to have ceremonial/funerary functions have also been defined, such as enclosed cremation cemeteries, recumbent stone circles, postcircles, ring cairns, ring ditches and so on. It is widely agreed that there are complex relationships between these various types and their myriad hybrids, or at least that comparisons can be made between various constructional elements.

The discussion and analysis of chevaux-de-frise in Britain have been limited both by the small number of extant examples and by the lack of detailed survey work at some of the known sites. Harbison (1971) discusses twelve sites from Britain and Ireland in some detail, and mentions another, then recently found by C. J. Houlder, that of Carn Alw. The purpose of this note is to describe the remains at this site, to indicate the potential of detailed survey of well-preserved examples, and to compare the evidence from Carn Alw with that from other sites including the nearby inland promontory fort of Castell Henllys (Mytum 1987) where excavation has recently revealed traces of another chevaux-de-frise.

A survey of Ingleborough was undertaken by RCHME in the summer of 1988 at the request of the Yorkshire Dales National Park who are concerned by the considerable erosion and damage occurring on the Peak as a result of the popularity of the Three Peaks footpath. This is affecting not only the natural surface of the hill but also the archaeological remains.

The summit of Ingleborough, one of the Three Peaks of the Yorkshire Dales, is a gritstone cap overlying the sandstone, shale and limestone beds of the Yoredale Series which, in turn, overlie the Great Scar Limestone. This formation gives Ingleborough its distinctive stepped profile, created by differential weathering, except where glacial drift forms smoother slopes on the flanks (Crutchley 1981, 41–44). The coarse gritstone forms a roughly triangular, plateau-like summit with only a slight rise from the rim to the highest point, at 723 m OD, now occupied by a triangulation pillar and cruciform walkers's shelter.