 Writer Richard Marshall commented that in their "rawness, spontaneity and expressiveness, [the pieces] give the impression of having been formed by natural forces.The formal and technical aspects of balance, proportion, and stability – although purposefully planned and controlled – are subsumed by the very presence of the material itself".Mason later equipped his studio to prepare, manipulate, and fire monumental sculptures in clay, many of which had to be fired in pieces weighing over a ton in kilns that had already been adapted to serve his large-scale purposes, before being assembled on the wall.