Complex sentence: The first of these was honoured throughout the convict era; and the second until 1868, when the last convict ship to Western Australia, the "Hougoumont", was sent out with 62 Fenian prisoners on board.
Split into simpler sentences: The first of these was honoured throughout the convict era. The second until 1868, when the last convict ship to Western Australia, the "Hougoumont", was sent out with 62 Fenian prisoners on board.