illicit cargo on spacecraft

Among the many items that have been carried into space without official approval are (1) a small set of hand-bells that Tom Stafford brought for the Gemini 6 mission which took place just before Christmas, (2) a batch of first-day covers, stowed in the personal lockers aboard Apollo 15 and taken to the Moon, which broke NASA regulations and led to the crew being severely reprimanded, and (3) a corned beef sandwich smuggled aboard Gemini 3 and eaten by Gus Grissom, who later brought it back up thus ruining a dietary experiment that had been set for him.