Complex sentence: He had to walk for eight days up the coast from York Factory through roadless country to meet his fiancee in Churchill but when the ship arrived a month late, he found that Betsy Fallding had missed the boat.
Split into simpler sentences: He had to walk for eight days up the coast from York Factory through roadless country to meet his fiancee in Churchill. When the ship arrived a month late, he found that Betsy Fallding had missed the boat.