The Beacon - Tapa dura

'The farmhouse was called The Beacon and they had been born and reared there, May, Colin, Frank and Berenice, but only May had been left for the last 27 years ...'

May had been the clever daughter and she had escaped the shelter of The Beacon, just once, to go to university. But in London she had been pursued by nameless terrors, the victim of fears and anxieties. Now she was the spinster daughter, the one who stayed, who nursed her father after his accident and looked after her mother in her old age.

Frank was the one who got away. He married and moved on. But why does no one ever mention Frank's name?