Preuilly sits at the heart of a prehistoric factory. The soil here is chalky, with many limestone outcrops. With this type of geology comes veins of silex (flint) - a material vital to prehistoric man. In some areas of the world, man's pattern of settlement is dictated by the availability of water. In the south Touraine water is abundant everywhere, so it was undoubtedly because of the flint that man came to live in the Claise and nearby valleys in the Early Paleolithic period, and the evidence of flint tool making has been found in many places in the district. Occasionally specialist tools made of shell or other material are found, but most tools from this time are flint.
Flint is very heavy - much heavier than the limestone, therefore it is worked where it is found. Very often, archaeologists notice that there are two piles of waste, that have fallen each side of the flint knapper's leg. These piles of waste can tell you how high the individual was sitting and what type of tools they were making. Archaeologists are able to reconstruct the flint nucleus by studying the pattern of detritus at some sites. This type of examination of the evidence gives a good understanding of the technical aspects of flint tool manufacture.
Recently I attended a flint knapping demonstration at our local museum. The flint knapper was a local teacher and archaeology enthusiast, Bertrand. He taught himself the technique, based largely on observation of ancient tools and 'factory' sites, which can reveal much about how the flint was worked in prehistoric times.
He uses the tools available to prehistoric man: 3 sizes of red deer antler, a boxwood club or hammer, hard river stones (hammer stones), smaller abrasive sandstones, some deer antler tips and a deer hide to protect his left thigh and knee.
Next, inspect your lump of flint closely. It may be a dalle (thin and flattish) or a rognon (nodule). The dalles will strike like a bell if they are sound and without flaws. It is more difficult to judge the quality of a nodule, but you hope for a nucleus that will strike a variety of tools from alternating sides. Each lump of flint is coated with a cortex of limestone, which sometimes needs to be removed before you can assess the best way to strike. The flint is dark grey, brown or orangey, somewhat translucent looking. The limestone cortex is pale and a few millimetres thick.
some polishing stones, antler 'nibbling' tools and a couple
of lames (blades) to the right.
Turning the nodule over, he then created a knife with a fine, very fragile edge. This was followed by using the face created to strike off a series of long thin flakes using the antler hammer. These types of tools were all typical of the Early to Middle Paleolithic, Bertrand said, or up to 40 thousand years ago.
polishing stones, antler nibblers and hammers, boxwood club / hammer
and a couple of pieces of tuffeau (soft limestone) to sit on.
In the latest phase of flint tool making, the techniques evolved to produce bifacial points, often of considerable size (30+ cm and 1cm thick). In French these are known as feuilles de laurier. They are essentially a big knife, which could take a whole day to make. The feuilles de laurier differ from the earlier blades because they are symmetrical. This means they can be retouched when they lose their keeness. Earlier sliver like blades have a different angle on each side and cannot be retouched. Small 'laurel leaves' can be glued to a lance to form a spear tip using resin or wax and twine. Such spears are designed to wound an animal, which would then have been tracked until it collapsed from loss of blood and exhaustion.
So much flint was used in prehistoric times it is now difficult to find big pieces suitable for making the larger tools. The toolmaker's level of skill is also nothing like the prehistoric artisans - even as a modern experimental archaeologist, you simply don't get enough practice at working the material. The quality of modern flint working tools is poorer. Modern deer are much smaller than the giant creatures that lived in prehistoric times.
It is clear that the southern Touraine and adjoining northern Vienne, from Bossay to the confluence of the Claise and Creuse rivers, was a significant tool making location. Not everywhere had a local source of flint and tools from this area were traded and circulated widely throughout France, especially to areas like Brittany, which has much harder rock and no flint.
PS Bertrand and I share a family name. He and I have a theory that we have a common ancestor from Germany, so are distantly related. Members of the family probably reached England and France due to the widespread practice of hiring German mercenaries from the Middle Ages onwards.