Ibrahim Halawa's family say they feel left in limbo and see no end in sight after a verdict in his trial was postponed.
The 21-year-old Dubliner has been in prison in Egypt for four years accused of serious charges arising out of a political demonstration.
He now has to wait until September 18 to learn his fate.
Speaking publicly for the first time, his sister Somaia read out a letter she says Ibrahaim wrote just last Sunday.
"Can finally one of my freedom dreams turn into a reality? I look into everyone's face in the cell. People seem happy that the story is coming to an end but I see deep down everyone is shattering into pieces," he wrote.