Re-written several times before her return to Sydney, 'Core of My Heart' was first published in 1908. The poem's name later changed to 'My Country'. Her family owned properties in the Gunnedah district of Nsw & Torryburn in the Hunter region, the poem is believed to have been inspired by the breaking of the drought there.
The poem is copyrighted, so I cannot print it here, hovered a web search will find the words. This was my favourite poem as a child. I've always loved My Country.