This is one of two glass points made by Karl Lee. The glass itself is quite old, and removed from a metal grid that overlay a cellar. I think these blocks are called cellar lights. Each glass block was in differential condition, and they all proved really difficult to extract (thanks to Joe Curley). However, once out they were workable. Metin Eren used one of the blocks to make a point and described the material as good to work with. Karl had two blocks and produced two nice points, one of which went to Joe Curley. Although I never got to see the finished Metin Eren point, I did observe him producing the early stages. His style is interesting and seems different to Karl’s. With his knapping hand Metin rested his elbow on his knee, thus reducing variability from the shoulder. The only moving joints were his elbow and wrist and it allowed him to concentrate on where he needed to hit. This seemed to make sense and I have adopted the same approach.