2014 $1 Kangaroo Series Explorer's First Sightings 1oz Silver Proof CoinFamed wildlife author John Gould often sought the assistance of talented artists, including Henry Constantine Richter. Richter produced hundreds of wildlife illustrations during his career, including all of the lithographs for Goulds 1845 publication, The Mammals of Australia. An image from that book has inspired this coins design. Richters depiction of Western Grey Kangaroos was taken from a sketch made by Gould on his 1838 journey to Australia,