A really interesting find! There is a video at the link below– you can see the notebooks at about 1:30.
Three rare handwritten notebooks from the first Indigenous activist to campaign overseas have been given a permanent home in Canberra. Anthony Martin Fernando left Sydney in the 1890s and travelled throughout Europe, publicising the plight of Aborigines in Australia. The notebooks which he kept throughout his travels will now be housed at the Australian Institute of Aboriginal and Torres Strait Islander Studies AIATSIS.