From the Brisbane Times:

Hidden under an old cane plantation outside the Queensland sugar city of Bundaberg lies an awful secret.

Beyond the weeping fig trees the bodies of 29 South Sea Islanders are buried in an unmarked grave.

(Slavery buried in Qld mass grave: Islanders)

They were called “Kanakas“. Growing up in Bundy I was taught that they were “workers”. Wikipedia claims “Of the more than 60,000 Islanders recruited from 1863, the majority were to be “repatriated” (that is, deported) by the Australian Government between 1906-08 under the Pacific Island Labourers Act 1901 legislation prompted by the White Australia policy.”

Or, as the above story suggests, just murdered and thrown into mass graves.