A total of 190 axe-hammers and 82 battle-axes from all over Scotland were studied. Attention was focused on the key question of whether the implements were made from cobbles or from scree-outcrop blocks. In glaciated regions such as Scotland, the nature of the source exploited is critical, since the area from which a rock-type may be obtained is greatly enlarged if cobbleblanks were used. Exhaustive petrological and typological studies sugest that a rather hap hazard exploitation of suitable-looking locally available rock-types tock place. The manufacturing experiments described here were designed to discover how the implements were made, and the essential properties required of the blanks. They showed that a blank should be (1) free of flaws, (2) of a suitable rock-type, and (3) close in form to the implement required. Thirty-one timed searches were made of cobble-deposits and scree/outcrop sites within the areas of dis tribution of the artefacts. Cobbles, because they are more often free of flaws and better-shaped, proved much superior to scree/outcrop blocks as blanks. The main conclusion of this paper, therefore, is that the great majority of Scottish battle-axes and axe-hammers were made from cobbles. There is evidcnce to suggest that this conclusion may be extended to the rest of Britain, and to other types of implement made by pecking and grinding, including some unperforated stone axes. -- AATA