The Cache is not at the posted coordinates
History
Valentine’s Day occurs every February 14. Across the United States and in other places around the world, candy, flowers and gifts are exchanged between loved ones, all in the name of St. Valentine. Where did Valentine's Day originate from? The history of the holiday—and the story of its patron saint—is shrouded in mystery. We do know that February has long been celebrated as a month of romance, and that St. Valentine’s Day, as we know it today, contains vestiges of both Christian and ancient Roman tradition.
By the middle of the 18th, it was common for friends and lovers of all social classes to exchange small tokens of affection or handwritten notes, and by 1900 printed cards began to replace written letters due to improvements in printing technology. Ready-made cards were an easy way for people to express their emotions in a time when direct expression of one’s feelings was discouraged. Cheaper postage rates also contributed to an increase in the popularity of sending Valentine’s Day greetings.
Americans probably began exchanging hand-made valentines in the early 1700s. In the 1840s, Esther A. Howland began selling the first mass-produced valentines in America. Howland, known as the “Mother of the Valentine,” made elaborate creations with real lace, ribbons and colorful pictures known as “scrap.” Today, according to the Greeting Card Association, an estimated 145 million Valentine’s Day cards are sent each year, making Valentine’s Day the second largest card-sending holiday of the year (behind Christmas).
Cache
To find the coordinates and sign the log, you must first solve this sudoku.
Now you have the solved puzzle, you can use it to find the cache with this:
The Cache can be found at
N 40 AB.CCD W 77 EF.GHI in this puzzle C=zero