"I went on board in an evil hour"

The missing dates here are supplied in some editions: 1 September 1659.  The first three editions showed blanks.

There is great significance in the dates of Crusoe’s adventures: as he points out here, he sets out on this voyage exactly eight years after his first voyage from home.

Defoe emphasises the bad omens which Crusoe fails to heed. There is a parallel to Milton's Paradise Lost in this technique.