How does the author use foreshadowing in The Daughter of Time?

Josephine Tey's Daughter of Time is a good, old fashioned detective story with a twist. Alan Grant, an inspector for England's famous Scotland Yard, finds himself confined to a hospital bed after taking an unfortunate fall in the line of duty. Grant's mishap involved plunging through a trap door and leaves him incapacitated, not to mention extremely bored as he recovers from his considerable injuries.His extra time and keen problem solving mind foreshadows his plunge into an ancient mystery.