Milne was railway stationmaster (later deputy chief commissioner for NSW Railways & Tramways) and collector of Aboriginal artefacts. He also located, documented and photographed Aboriginal carved trees, found at initiation and burial sites. In 1918 Robert Etheridge (director of the Australian Museum, Sydney) published The dendroglyphs or "carved trees" of New South Wales largely based on Milne's sites.
Source: Extracted from: NSW State Library 'Manuscripts, oral history & pictures' website, viewed 1.8.2011
Photo from fronticepiece of The dendroglyphs or "carved trees" of New South Wales re-issued by the State Library of NSW in 2011.