He died of senile dementia in the Fremantle Lunatic Asylum ( now the Fremantle Arts Centre building ) on 13 August , 1900 . He was buried in Fremantle Cemetery . He died of senile dementia in the Fremantle Lunatic Asylum ( now the Fremantle Arts Centre building ) on 13 August 1900 , and was buried in Fremantle Cemetery .