I was thinking silver things, seeing as Phil kept going on about a silver anniversary at the start of the race, but then I realised the clue in the treasure on Leg 1 was gold (it still looks silver to me). But the Pearly Kings and Queens on Leg 2, and then the brooch clue for the pit stop on Leg 3. I didn't notice anything on Leg 4 though, so I think I'm probably wrong and that I'm going crazy.