Sad to hear, but inevitable, I guess.
I have admired Don Charlwood's literary style for many years. I think that I have read nearly all of his books. Besides the aviation themes, he also wrote a couple of books on the early days of sailing ships in Australia. I believe his grandmother was a passenger on a ship that was wrecked near Cape Otway.
His social observations in "Marching as to War" give a great insight into his early days in Victoria.
"Take off to Touch Down" was required reading for young ATC trainees. Don was on the interview board for my ATC selection in 1970. (The same course as my mate Nigel, above). He seemed old in those days and I was amazed to hear quite recently that he was still alive and with a very active mind.
Sadly Missed
Kingsley N