Where is the silver peace medal on Time Tangled Island?

In Time Tangled Island, the Peace Medal belonging to Lewis and Clark is at the hilltop workshop of Leonardo da vinci (time device 4 o'clock, 1516 AD). Climb out onto the wooden platform at far right, and jump onto the higher platform at the left. This will shift the position of the smaller platform in the gap. Jump down on to the smaller platform, then jump hard to the right to grab the medal.

*If you can't reach it, get Leonardo's notebook and he will give you his glider wings. The notebook is at the Statue of Liberty in 1882 AD (10 o'clock on the time device) : climb to the top left of the statue supports and jump hard left to reach the notebook on the ledge.