You need to complete the Railway Viaducts of Cornwall Part 1 in order to obtain the information to determine the coordinates.
The final cache is within 2 miles of the headline coordinates and is close to the Cornwall Mainline.
There is parking close to the final GZ.
Using the numbers obtained in the Adventure Lab, use the following formula to calculate the coordinates.
N 50 (B-E) (A-A).(A+D) E( CxD) W 004 (DxD) (B-A).(B-C) (AxD) (C+D)
Please beware of nearby golfers and vehicle traffic - be stealthy at all times.
The cache is a small click lock box in a camo bag - please rehide exactly as found.