Nepean River or Main Branch of Hawkesbury
1805 Constable Andrew Thompson leads assault by large body of settlers from Windsor to "pacify" Branch natives on west side of Nepean River. Yaragowhy goes ahead to warn his people; he is shot and dies in the attack.
Related event
Sergeant Obadiah Ikin sells his land across the Nepean River after the massacre.
1809 Confluence of Nepean, Hawkesbury and Grose Rivers (GW Evans? SLNSW)