Dewey was exploring in Murray Street and found a plaque on a heritage listed building at Waypoint 1.
He read the plaque, as Dewey does, and discovered that something had happened for the first time on the WX day of December 1859. He also noticed that there had been quite a few entries in the lyrics section. If you took 4 away from the number of entries in the lyrics section, you would get the number YZ. You can substitute the numbers WX and YZ in the co-ordinates below.
S 34° 35.7yz E 138° 44.3wx
These co-ordinates are where Dewey left his fishing rod when he last tried his luck in the nearby river.
If you have a little bit of free time you could go to the parking co-ordinates listed below, where Dewey sometimes goes roller skating, plays sport and returns his library books. From here it is only a short walk to the co-ordinates you have decoded above.
You may need to fish a little at the location but you will discover what Dewey caught - a geocache with interesting things to trade!
The final location is available all hours. However you are not advised to attempt this stage during the Gawler Show which takes place in August each year. Admission fees apply during the Gawler Show weekend.