Ken Simpson passed away on Wednesday 9 July 2014.
"On his last Daintree trip Lloyd Nielsen and I showed him a new Australian bird.
It was a Mangrove Robin in the lower Daintree River and the year was 1996 or thereabouts. He had just taken some close up shots of a Great-billed Heron for Nicholas Day the illustrator of the Simpson and Day field guide because Nicholas had never seen one in the flesh as his earlier illustrations showed."
2014. The Simpson & Day Field Guide to the Birds of Australia is the benchmark for Australian field guides.