Coniston massacre
Brooks was killed on or about 7 August 1928, and his body was partly buried in a rabbit hole. No eyewitnesses to the actual murder were ever identified, and there are conflicting accounts of the discovery of the body and subsequent events.
Cape Grim massacre
On 10 August Robinson encountered convict William Gunchannon, another of the four who had been present at the massacre. Gunchannan admitted his involvement, estimating it had happened about six weeks after the destruction of the sheep, but was reluctant to provide detail. He told Robinson that the Aboriginal group attacked on 10 February had included men and women, but denied knowing whether any had been killed. Robinson later wrote that when he informed him that Chamberlain had already admitted a death toll of about 30, Gunchannan "seemed to glory in the act and said he would shoot them whenever he met them". Robinson did not interview the other two involved in the massacre: Richard Nicholson had previously drowned and John Weavis had since moved to Hobart.