Final answer:
The texts provided pertain to the Greek goddess Demeter and her associated mysteries, and do not discuss the ship Demeter from Bram Stoker's 'Dracula'. The voyage in question in the context of Stoker's novel involved mysterious disappearances of the crew, which is not covered in the provided excerpts.
Step-by-step explanation:
The strange occurrences aboard the Demeter during its voyage are actually not covered in the texts provided; none of the cited references pertain to the ship Demeter from Bram Stoker's novel 'Dracula', which is likely what the question is about. The texts discuss various aspects of the Greek goddess Demeter and her mysteries, but not the specific events aboard a ship. The voyage of the Demeter is a significant plot element in 'Dracula', where mysterious and frightening events unfold as the ship transports the eponymous vampire from Transylvania to England. The crew diminishes one by one under mysterious circumstances, leaving the ship arriving at Whitby with only the dead captain tied to the helm.