In 1842 on the outskirts of Kilcoy Station owned by MacKenzie, 30–60 aborigines of the Gubbi Gubbi tribe, two Djindubari and some men from the Dalla tribe died from eating flour that settlers had laced with strychnine or arsenic. There were a number of widely publicised instances around this time of large teams (30-50+) of white shearers being killed with strychnine in their evening meal, always in the period between them finishing the year's work and receiving their pay, but this is the only known case of a similar number of Aborigines being treated the same way.