Mrs. Margaret Migillicudy, retired principal of Oakbrook high school, scourge of more than one generation of teenagers, had died peacefully in her sleep at the age of 99. I rolled the casket into place, locked the wheels and straightened the rosary wound around her hands. I stepped back for a last look. The body was ready to receive visitors. My name is Mona DaVinci and trust me I’ve heard all the jokes. My nickname in high school was Mona Lisa. I own Da Vinci Funeral Home and Mortuary.