The clay here at Grymsdyke is mixed with pieces of flint, which by itself is a beautiful stone, but the large pieces need to be removed in order to make bricks. The process we used for the workshop, hand-crumbling the clay into coin-sized pieces and picking it over for stones, was our only option, given that we had very little time and many eager people. This time, since I have more time but am alone, I am trying a different process, which involves 1 soaking the clay overnight 2 mixing it into a slurry with a hand-held power mixer 3 straining it 4 spreading it out to dry Number 4 is the most problematic so far, given the propensity of English weather to pour rain unexpectedly. I'm going to look into other options, such as making a batch of powdered dry clay to mix in.