"Through some mysterious alchemy, some trick of science, Cyril was expected to transform this foul fungal mash into a flavoursome food product".
How did an Australian scientist go from developing munitions during WWI to creating a new spread that's survived and thrived over the decades?
In his new book, Jamie Callister explores how his grandfather Cyril mingled with Prime Minsters and titans of industry on the way to creating Vegemite.