Though we know the estimated date of death (537 at the Battle of Camlann), we don't know when he was born. Of course this is all assuming he ever actually existed. -~Iolaos~-
Arthur Lydiard died in Texas on December 11th 2004. He was killed by a myocardial infarction. He was 87 years, 5 months and 5 days old when he died.
He Was 13 years old..
Arthur Balfour died on March 19, 1930 at the age of 81.
Arthur Evans (archaeologist) died at the age of 90.