Change the given text to have better consistency:
In 1833 he had also made a move into shipping, acquiring a schooner built in Svaneke on Bornholm. By 1858, his company, Heering Line, operated a fleet of ten merchant ships which sailed on South America and the Mediterranean Sea.
In 1833 he had also made a move into shipping, acquiring a schooner built in Svaneke on Bornholm. And by 1858, his company, Heering Line, operated a fleet of ten merchant ships which sailed on South America and the Mediterranean Sea.