Missing artifacts from WW II Nazi code breaker and a "father of modern computing" found with...

Items belonging to an Englishman credited with cracking encrypted Nazi communications during World War II and who later earned accolades as one of the founding fathers of computer science were discovered in the possession of a Colorado woman in 2018, nearly four decades after they went missing.

In late August, Denver-based federal investigators flew across the Atlantic to return those items — which were enthusiastically received.

"We thought probably that was the last we were ever going to see of them," said Dominic Luckett, headmaster at Sherborne School, in BBC coverage of the repatriation ceremony. "So it was a rather pleasant surprise when we got wind that the American authorities knew they were in America and they were doing their best to track them down and get them back."

But that's not the end of the story: How those artifacts got to Colorado, and whether they were stolen or secretly given away — are mysteries that have not been solved.