Police are still searching for a Tilbury man who has not been seen since Saturday August 16.
David Burgess, 53, was last seen when he went out for a walk in the countryside around his home near Linford.
Members of Mr Burgess' family called the police when he failed to return in time to start work on Monday at a local farm.
Numerous police units are involved in a widespread search across Linford, which includes dogs and a police helicopter.
Ch Insp Andy Fusher said: "We are now extremely concerned that he might have been taken ill or has had some sort of accident in a remote area of farmland or marshes."
Last seen wearing a blue zip-up fleece, blue jeans, a blue baseball cap and green wellington boots, Mr Burgess is also 5ft 10in tall, and has cropped and thinning hair. He also has tattoos on the back of both his hands.
Anyone who has seen Mr Burgess should call Essex Police on 101.
