The cache is not at the posted coordinates. The above coordinates will take you to a historic sign where you can solve the following for the correct coordinates.
N42 36.19A W098 0B.64C
A=(Second # in year of Shannon's birth)-7
B= Number of years that they expected to be gone
C=# of Shannon's younger brothers & sisters
This cache is part of the Pvt. George Shannon Trail caches, that will lead you throughout Northeastern Nebraska. Pvt. Shannon became lost near here while traveling with Lewis and Clark and the Corp of Discovery in 1804.