At some point, they chose to shift the events in the late 1795 storyline from April? or so, to the end of the year, slopping over into 1796, which would make it winter, and i imagine that for long stretches of the year, such as winter, ships didn't sail. Originally, though, it was supposed to be Spring, I think. Look at Bradfords's grave.... I think it had an April (or so) 1795 death date, then later, someone has crudely altered it to "1796" with a felt-tip or something. I'm not sure what the plan was, with shifting events forward a few months.