Confederate Code Question

Factual Questions
1

Geocaching related.

I can’t find anything using Google to help me decipher this code.

Please look here and tell me how I can decipher this. I don’t want the the actual answers but rather how I can do this myself.

Thanks.

2

I remember seeing a similar code in a Sherlock Holmes story, “The Adventure of the Dancing Men”.

3

Found it

4

You were correct. Thanks.