Complex sentence: It established the first rail link between St. Boniface and St. Paul, and when Kittson sold his shares in the company in 1881, it made him a very wealthy man, running his investments into the millions.
Split into simpler sentences: It established the first rail link between St. Boniface and St. Paul. When Kittson sold his shares in the company in 1881, it made him a very wealthy man, running his investments into the millions.