 After exploring the surrounding area, he met with the elders of the indigenous Aboriginal group, the Wurundjeri of the Kulin nation alliance, and negotiated a transaction for 600,000 acres (2,400 km²; 940 mi²) which later became known as "Batman's Treaty".The transaction, which is believed to have taken place on the bank of Merri Creek (near the modern day suburb of Northcote), consisted of an offering of