Above is a photo that shows the process of how I replicated this particular drawing. I did not draw guidelines from the ruler however, I placed the ruler on the page so that the ruler's horizontal edge could help guide me as I illustrated horizontal neurons' anatomy. The ruler also helped as a reference for proportion. The blue-green dots indicate where I thought the cells would be located on the drawing however, I realized that I placed them too high. I, therefore, lowered them. This photo shows the scale of my work in comparison to Cajal's original drawing. I re-create his work 125%-200% bigger than it is in real life.