The family of a girl who went missing from Fairy Meadow Beach more than 40 years ago has made a last-ditch appeal for information on her whereabouts.Cheryl Grimmer was just three years old when she vanished on January 12, 1970.On Monday, an inquest will be held into her disappearance and suspected death at Wollongong Coroner's Court.Family members will attend, including Cheryl's mother Carole, who will fly down from Queensland.Father Vince, who never gave up hope of finding his only daughter, died seven years ago on Saturday.Cheryl's eldest brother Rick said it was vital that any information not already submitted to police be produced."We've had a lot of leads over the years that have been investigated, but they've all come to nothing," he said."We're just hoping that someone out there holds the key."Wollongong police Detective Sergeant Steve Davies joined the family's appeal, asking that anyone with information, no matter how small, come forward.Cheryl's disappearance at the beach resulted in one of the region's biggest searches and created nationwide headlines in newspapers for months.The pressure was such that the family relocated to England for 10 years to escape the media attention.The story resurfaced periodically over the years but no trace of the blonde-haired child has ever been found.Cheryl had gone to have a shower with her brothers Rick and Stephen in the men's dressing shed after spending a day at the beach.When the boys called her from the shed she did not respond and seemingly disappeared without a trace.In the four decades since her disappearance, the most compelling information to emerge has been the sighting of a man leaving the scene with a child wrapped in a white blanket. He was spotted driving away in an old, cream-coloured Holden.The suspect, a man aged 35 to 40, was described as Mediterranean in appearance and wearing orange shorts and a cream shirt.Cheryl would have been distinctive, as she had a medical condition that made her belly button protrude about 10mm.If she was abducted and raised with another family - one theory that was investigated by police - she would still be carrying this physical feature or would have had it removed.