According to Queensland BDM Rhoda Ames passed away in 1896 rather than 1898 as show on the headstone. She does not appear to be interred in Toowong Cemetery as I could not find her on Cemetery records.
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BillionGraves.com record for Rhoda Ames (Mitchell) (31 January 1896), BillionGraves Record Toowong Cemetery, Brisbane, Brisbane, Queensland, Australia, Oceania