The code relied on a simple letter/number correlation. Only in this case, he’d used the number of blank spaces after the punctuation mark at the end of each paragraph. At first blush, no one would even see his secret hidden in plain sight.
To whom it may concern, and yes, it concerns you, there is a hollow beneath the oak tree in the back yard where you’ll find a metal box. In the box you’ll find my letters, unsent, each addressed to the same destination, written to the same person, she who holds my heart in lace gloved hands. Her rejection of the faulty truth would render my life as the dark colored leaves strewn upon the ground in autumn.