As I Was Going to St Ives... Mystery Cache

Small round tub

This cache is NOT at published coordinates. The coordinates are of interest only as the inspiration for this puzzle. You can visit them if you like, but you'd better have your drinking boots on!

As I was going to St. Ives,
I met a man with seven wives,
Each wife had seven sacks,
Each sack had seven cats,
Each cat had seven kits:
Kits, cats, sacks, and wives,
How many were there going to St. Ives?

There are several answers to this riddle. The most popular of course is 1 because the man and his wives are assumed to be leaving St Ives.

However, there is great debate that the man and his wives could have been caught up with by the author or they met in an Inn whilst they were over-nighting; this is the answer we're going to assume here.

So, this answer is ABCD. A checksum for this is 17

The cache can be found at N 52° ([A x C] + B + D).CBB W 000° 0(D+1).ABC

Note: No geochecker, you have a checksum on ABCD.

Please: No spoiler logs.

Remember: No Signey, No smiley.