Upvote:1
From my memory, the guy collecting crossword words was a teacher who asked his class for possible words. A kid lived near some barracks housing a portion of the invasion force and eavesdropped on them, and told his teacher the code words(albeit not knowing that they were code words, and not telling the teacher were he got'em). The British intelligence guys roughed up the teacher but eventually found out about the mix up. They didn't tell the American intelligence people as far as I know. The kid got a very stern warning and the teacher never asked his class for words again.