The cache is NOT at the posted coordinates.
The Dixon Developmental Center originally opened as the Illinois State Colony for Epileptics in May 1918. It's purpose and name changed several times over the years, eventually being taken control of by the Department of Mental Health in 1961. It became the Dixon Developmental Center in 1975.
There are many online resources where one can find burial records of the men, women, and children who lived and perished at this center. Use one of these resources to look for a man and a woman, Oscar and Ophelia, who share a common last name that is a hint for where this cache is hidden. Use the information from their gravestones to solve the true location of the cache.
You will find the cache at N 41 ab.cde W 089 fg.hij
a = Oscar's birthdate minus Ophelia's birthdate
b = the last digit of Ophelia's death year
c = the difference between Oscar's deathdate and his birthdate
d = the difference between the first and second dates of Ophelia's deathdate
e = the first digit of Ophelia's deathdate
f = the number of vowels in Oscar's last name
g = the last digit of Ophelia's birth year
h = the third digit of Oscar's death year
i = the difference between the third and first digits of Ophelia's birth year
j = the first digit of Oscar's birthdate plus the digit of his death month
You can validate your puzzle solution with
certitude.
