Sir Frank Macfarlane Burnet OM AK KBE had one hundred billion cells in his brain. Sir William Dargie CBE was not a pointillist and made no effort to depict said cells. The clean white vestment of the laboratory is his iconography, instruments of microbiology the arranged symbols of his Blessed. So do each of us, have one hundred billion brain cells. How some use these cells to arrive at perfected solutions to immunology while others have trouble remembering to take the next capsule from the blister pack each morning of July is one of those mysteries that defies complete explanation.