Castle Hill convict rebellion

Background. Many convicts in the Castle Hill area were veterans of the United Irish movement and the 1798 rebellion in Ireland. Following news of Robert Emmet's attempted rising in Dublin, a similar conspiracy formed in early 1804. Phillip Cunningham and William Johnston planned an uprising, intending to rally at Constitution Hill and march on Parramatta and Sydney, aiming to establish Irish rule in the colony.

Outbreak. On 4 March 1804, 233 convicts led by Philip Cunningham escaped from a prison farm at Castle Hill. John Cavenah set fire to his hut as the signal for the rebellion. The rebels gathered weapons, ammunition, and food from local supporters and the government farm. They intended to capture ships to sail to Ireland, but the fire signal was not seen by convicts at Green Hills on the Hawkesbury River.

Suppression. Colonial forces, including the Sydney Loyal Association militia and New South Wales Corps, were dispatched to bolster the garrison at Parramatta. Governor King announced leniency for those who surrendered before 10 March. The rebels were pursued by George Johnston and caught on Rouse Hill on 5 March 1804. Martial law was lifted on 10 March, but the insurgency continued.

Aftermath. Following the rout, loyalists hailed the skirmish as "Australia's Vinegar Hill". Punishments included whipping and detention at the Governor's pleasure, with some sent to coal mines. The battle site is believed to be east of the Rouse Hill Estate. The Government Farm at Castle Hill was later recognized as a place of international and Australian significance.