Between 1889 and 1894 King travelled widely in New South Wales and Queensland, making many photographic studies of Aboriginal Australians.

[2] In later years he turned to landscape photography, using the dry-plate technique, and produced a great many scenic views of Sydney.

[3] He also photographed notable views around New South Wales, including scenes of Jenolan Caves taken using magnesium flares.

[3] After King's death, many of his glass negatives were purchased by J. R. Tyrrell and passed to Consolidated Press Holdings.

[3] The Tyrrell Collection, which includes works by a number of Australian photographers, is now held by the Powerhouse Museum.