Complex sentence: By the 1850s the Hudson's Bay Company lost interest in providing financial aid to the colony, and in 1869 the HBC "sold" Rupert's Land (received compensation for surrendering its trading monopoly back to the British Crown) to the expanding Dominion of Canada.
Split into simpler sentences: By the 1850s the Hudson's Bay Company lost interest in providing financial aid to the colony. In 1869 the HBC "sold" Rupert's Land (received compensation for surrendering its trading monopoly back to the British Crown) to the expanding Dominion of Canada.