Question: Who contributed to The Digger magazine and is an Australian cartoonist?

Context paragraphs:
John Ditchburn: John Ditchburn is an Australian cartoonist who has contributed to the "Ballarat Courier", "Eureka Street", the "Independent Monthly", "Border Mail", and the "Australasian Post".

Michael Leunig: Michael Leunig (born 2 June 1945), typically referred to as Leunig (his signature on his cartoons), is an Australian cartoonist, poet and cultural commentator.  His best known works include "The Adventures of Vasco Pyjama" and the "Curly Flats" series.  He was declared an Australian Living Treasure by the National Trust of Australia in 1999.

Dean Alston: Dean John Douglas Alston (born 1950) is an Australian cartoonist who became the editorial cartoonist of "The West Australian" newspaper in 1986.

Digger slang: Digger slang, also known as ANZAC slang or Australian military slang, is Australian English slang as employed by the various Australian armed forces throughout the 20th and 21st centuries.  There have been four major sources of the slang: the First World War, the Second World War, the Korean War and the Vietnam War.  The name Digger slang derives from the cultural stereotype of the Digger in the First World War.  Graham Seal AM, Professor of Folklore at Curtin University of Technology, calls the slang Diggerese.  It is a combination of an occupational jargon and an in-group argot.

Cathy Wilcox: Cathy Wilcox (born 1963) is an Australian cartoonist and children's book illustrator, best known for her work as a cartoonist for "The Sydney Morning Herald" and "The Age" newspapers.  She has also twice won the Australian Children's Book Council's 'Picture Book of the Year' award.  In 2007 she won the Walkley Award in Cartooning for a cartoon about Sheikh Taj el-Din al Hilaly's infamous 'uncovered meat' remarks on Australian women.

Beyond the Black Stump (comic strip): Beyond the Black Stump is an Australian comic strip written by Sean Leahy.  It debuted in 1988 and won the "Best Comic Strip" at the 2003 National Coffs Harbour Cartoon Awards and the "Comic Strip Cartoonist of the Year" at the Australian Cartoonist's Association's Stanley Award the same year.

Dillon Naylor: Dillon Naylor (born 1968) is an Australian cartoonist, illustrator and toy designer.  He is the creator of the comic strip "Batrisha the Vampire Girl", which appeared for six years in the children's magazine "K-Zone" and was the basis for two children's books.  Other comic strips include "Rock 'n' Roll Fairies" which appeared in the children's magazine "Total Girl", and "Camilla and Mike" which appears in the educational magazine "Challenge".

Jason Chatfield: Jason Chatfield (born Perth, 1984-) is an Australian cartoonist and stand-up comedian, based in New York City.  At 23 he became Australia's most widely-syndicated cartoonist, appearing daily in over 120 newspapers in 34 countries.  His art spans the disciplines of comic strip, gag cartoon, editorial cartoon, book illustration, caricature and commercial art.  His work has appeared in The New Yorker.  At 26 he was elected President of the Australian Cartoonists' Association, making him the youngest person to hold the position since the organization began in 1924.  He currently serves as Vice President of the National Cartoonists Society.

Stewart McCrae: Stewart McCrae (born 1919- 5 June 2008) is an Australian cartoonist who contributed to the "Brisbane Courier Mail" newspaper and bulletin.

The Digger (alternative magazine): The Digger was an alternative magazine published in Australia between 1972 and 1975.  It was established by Phillip Frazer, Bruce Hanford, and Jon Hawkes.  Notable contributors included Ron Cobb, Ian McCausland, Bob Daly, Patrick Cook, Beatrice Faust, Ponch Hawkes, Helen Garner, Michael Leunig, Anne Summers, Neil McLean, and Phil Pinder.

Supporting paragraphs: The Digger (alternative magazine) Michael Leunig
Answer: Michael Leunig