Complex sentence: In 1845, Hack began a business with several bullock drays carting copper ore from the new mines at Burra to Port Adelaide and by 1848, he had interests in a timber business.
Split into simpler sentences: In 1845, Hack began a business with several bullock drays carting copper ore from the new mines at Burra to Port Adelaide. By 1848, he had interests in a timber business.