Spoiler (click to reveal)
Im trying to figure out the cypher without much luck. Based on the circled sections I'm assuming I'm supposed to use the dial and the date to decode the circled message, but neither using the dial directly nor adjusting letters or offset by 10 gives meaningful words. Same for Sherlocks clue code and the same trials on the 19ths. Given this is meant to be solvable by hand I feel like I'm missing something obvious.