 From about 1820 a small contingent of Government troops were stationed at La Perouse headland to scout for the unexpected arrival of ships and to monitor and control smuggling activity.By 1822 these troops were housed in "Macquarie's Tower", a sandstone castellated watchtower.From 1829 when the monuments to Laperouse and Pere Receveur were erected the watchtower was used as accommodation for a caretaker employed to look after the La Perouse Monument and the tomb of Pere Receveur.