Carl Walter

[3] Walter discovered and collected a new species of mint bush on Mount Ellery which was named in his honour as Prostanthera walteri by Victorian Government Botanist Ferdinand von Mueller in 1870 .

[2][6][7] In 1906, Walter described a new subspecies of the orchid Diuris punctata in The Victorian Naturalist, based on plant material collected at Mount Arapiles by St. Eloy D'Alton.

For a twenty-year period starting from about 1862, he would periodically travel to eastern and alpine regions of Victoria with camera equipment and camping gear in a backpack;[10] "the whole weighing about fifty pounds.”[11] Much of his early endeavors revolved around documenting portraits of indigenous people and capturing the mission stations of Ramahyuck (Lake Wellington), Coranderrk (Yarra Flats) where he made 106 photographs, and Lake Tyers.

[12] Walter advertised in 1871 "an extensive collection of Stereoscopic Views depicting Aboriginal Life, Mining, Scenery, and other Australian Subjects."

He predominantly employed a stereoscopic camera but also produced some half-plate and whole-plate negatives, most officially registered his photographs with the Victorian Copyright Office in 1870.