 The gum of Eucalyptus robusta, "yarra" was also used medicinally.The leaves of the Manna Gum, "horra", were used to treat ophthalmic maladies such as "narrada mil" (bad eye).In terms of internal medicine, their properties were used in cases of diarrhoea, something MacPherson observed as working when he applied the remedy to a pet opossum suffering from loose bowels.