If you look north from Ribeira Brava you can see a sharp edge on the right side. On this edge a long stairry path leads you from Meia Legua to Espigao.
In the middle of the path right at the edge you can find the Cache. It will be at least "800 «dolorosos» degraus" as written in this article from JM:
Jornal da Madeira
The last 25 m the terrain is 4, you have to climb.
As we do not live permanently on Madeira we can ask a friend who lives in Canico if maintenance is needed.