I was now experimenting with an art form not taught at the Academy of Art where I intermittently attended for four years and didn't bother to take exams or ask for grades. Fortunately, I learned faster by trial and error. The stone murals were complicated and had to be done in 20 inch x 20 inch sections. The materials were placed in a bed of petroleum jelly with a frame around it. The drawing was a mirror image of the final design. The dentist recommended a dental gypsum cement as the base for the mural. This was poured into the frame and allowed to set. When it was turned over, the petroleum was removed and, after installation, replaced with mortar. Pictures of the mural went to many architects but no one responded.