David Dyke, a 25-year-old Noble Park man, took his
three-year-old son and eight year-old niece to the Edithvale beach to cool off
on a hot January afternoon in 1976.
His niece, reportedly the last person to see David, watched him go into the water but never sighted him again.
At the time of his disappearance David was wearing a yellow t-shirt, trousers over his brown swimming shorts and was barefoot.
He had no financial means on him at the time of his disappearance and it appears he has not accessed his bank account since.
However the sea was calm that day and there are no reports of any swimmers in distress.
Police would like to speak to anyone who might have seen David around the time of his disappearance or have any information about his whereabouts.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000.
**Editor's note - I am in touch with David's family and
can pass on a message to them if need be.