Julie suggests prodromus, which the Free Dictionary defines as "An early symptom indicating the onset of an attack or a disease." De-latinised the word is prodrome, hellenised the word is prodromos, The Latins took it from the Greeks; in both languages it meant precursor.
There is a secondary meaning too, which is a preliminary course or publication. I think this is what Julie encountered one morning in her breakfast reading - Museum Victoria's "Treasures" book, which refers to the titles of two books published by Frederick McCoy in 1874: Prodromus of the Zoology of Victoria and Prodromus of the Paleontology of Victoria. Julie, if this is what you read at breakfast, what must you eat?