At the given location find a phone number for "F.W." 01ABC DE17DE. It may not be obvious; look around!
The cache is hidden at N49 5C.A((B+C)-D)(A+B) W006 1D.(D+E)(B-E)(C+E) which is back on St Mary's.
Good luck & happy hunting!
With thinks to both Isles of Scilly Wildlife Trust for their permission to place this cache and geocacher Pljg, who is its local guardian. NOTE, IoSWT will not give permission for a physical cache on Samson due to its SSSI and SAM status. However, virtual waypoints - such as this cache's - are ok.
Caches in the 'Simply Scilly' series:
Scilly String (St. Mary's, IOS) - The Final or Bonus cache, tying them together.
Scilly Walks (Bryher, IOS) - A nice walk on Bryher.
Scilly Sausage (Burnt Island, St. Agnes, IOS) - Clue is in the name. Note: TIDAL!
Scilly Putty (view of Gugh, St Agnes, IOS) - Originally near a golf course..!
Scilly Haircut (Samson>St.Marys, IOS) - This cache. Not on Samson, but a visit is required as well as recommended!
Scilly Season (St. Martins, IOS) - A Wherigo cache; download the Cartridge in advance.
Scilly Billy (Tresco, IOS) - Set in 2012 as IoS first Letterbox/Hybrid. Find it in two ways.
Scilly Questions (Somewhere on IOS) - A nice easy puzzle.