Where was John Callahan, creator of John Callahan's Quads, from? 
John Callahan's Quads!: John Callahan's Quads! John Callahan's Quads!:  is a Canadian-Australian co-production cartoon, based upon work of John Callahan. John Callahan (cartoonist): John Michael Callahan (February 5, 1951 – July 24, 2010) was a cartoonist, artist, and musician in Portland, Oregon, noted for dealing with macabre subjects and physical disabilities.
Portland, Oregon