The given coordinates are for the Little Bridge where you will need to do some counting:
Number of vertical posts = X
Number of floor planks = YZ
A = X - Y - Z
B = X + Z
C = Z * 2
D = X - Z
E = Y - Z
F = X - X
The cache can be found at:
N52 30.ABC W001 24.DEF
Checksum (all digits) = 41
The Little Bridges series was started by Stanthews in 2009 to highlight small footbridges in remote parts of Wiltshire. Since then the series has been expanded by others all over the country and starting to spread fast. There is a stats listing, so you can see how many Little Bridges you have found, you can find it here:- www.littlebridgesseries.co.uk . If you would like to add to the series, please contact us via the Little Bridges website with your caching name, name of your Little Bridge and the GC code and we will give you a number for your bridge. To qualify, the bridge must be a foot bridge too small for vehicles, please make sure your title exactly matches "Little Bridges # xxxx then the name" including spaces so it will get picked up and added to the stats list.