“Good heavens!” growled Beorn. “Don’t pretend that goblins can’t count. They can. Twelve isn’t fifteen and they know it.”
“And so do I," Replied Gandalf, "There were Bifur and Bofur as well. I haven’t ventured to introduce them before, but here they are.”
The Eccleshall Ring is a 2-3 Hour walk south of Eccleshall, based on the 13 Dwarves that accompanied The Hobbit. Suggested starting cache is GC2C773 Óin.
ASK Bifur: Where's Gandalf?
Collect the numbers from each cache if you want to find Gandalf, a bonus cache also near Eccleshall. Bifur's number is on the inside of the lid of the cache container.