Correct lack of cohesiveness problems in the paragraph
The gold rushes occurred hard on the heels of a major worldwide economic depression. About two per cent of the population of Britain and Ireland immigrated to NSW and Victoria during the 1850s.
The gold rushes occurred hard on the heels of a major worldwide economic depression. As a result, about two per cent of the population of Britain and Ireland immigrated to NSW and Victoria during the 1850s.