This is a mini multi-cache within a neat little park in Markham. There's water and a beach area here, but my advice is stay clear of the water. During the winter, this park is not crowded but in summer on weekends... watch out! Leash-free dog zone near to and part of the cache experience, so bring Fido
Inside a small greenish ammo can you will find a greeting card. It contains a message to you and is signed. Of course it isn't addressed to anyone in particular... although I can guess who might be the first one to this cache... but it is addressed to Cacher #1.
All you have to bring is another signed card to exchange. My suggestion is that you put a message in there and address it to the next cacher (#2, #3, #4 and so on. Clearly something you'll have to do either on site or just before you leave home to head for the find.
There is a logbook, so please sign it too.
At the posted coordinates -- by the entrance to the park -- there is a small green sign with a four-digit number on it. Write this number down, and then add each of the digits together. Their sum will be a two-digit number. You are going to do some subing and transposing with these numbers so suggest you label the tens digit A, and the ones digit B (that's AB folks). OK. Park now and rest for a while!
To find the clue for the actual cache coordinates, go to this location (inserting the digits found at step one as shown) 43° 51.9BA: 79° 16.AB8. Once there you will find a small sign telling you that you are facing a "leash-free area" and on that sign is a By-Law number. The number takes the form 0000-00. Write it down and move on to the final step.
The cache is hidden within walking distance of the sign in Step 2 but to find it, you will have to add the first four digits from the By-Law number to 43° 49.978 and then subtract the sum of the first four digits and the last two digits of that number from 79° 18.072