That river in Egypt

Damocles wasn't giving up on his escape just yet. He was going to do as much as he could without Rennala being able to see it from the table. He felt around the cuffs to see if there was a button he could press to unlock them. But of course, he felt only a keyhole. In frustration, he kicked his feet up and down and realised that although they were cuffed together at the ankle, neither of his feet were attached to the chair. That gave him hope, but then he thought again and wasn't so sure.