I heard a long time ago that there was such a shortage of women during the San Francisco gold rush that miners would routinely ship their clothes across the pacific ocean to be laundered and then shipped back. I did some googling on this recently and found inconclusive and conflicting results.
So, was this a thing that actually happened or an urban legend?
This piece from The Examiner seems to support that it happened while this discussion from alt.urban.folklore believes it was passed around as a joke that became believed as truth.
It looks to me like the situation being described in the first link is that in the very earliest days of the gold rush, it cost too much to do laundry and so the miners would just sell their soiled clothes to the ships that were heading back after dropping off supplies (which included clean clothes.) I’m not sure I’d exactly call that “sending your laundry to be cleaned” abroad, even if maybe some of the clothes might have made a round trip.
At any rate, I don’t think the above situation would have persisted very long since the Chinese laundries were established fairly soon after the '49 rush.
I don’t know if this is urban legend, but when I was in Manaus, Brazil, the museum claimed that the rubber barons would ship their clothing back to Europe to be laundered.
LOL, but just in case of whoosh, they really were rubber barons, not “robber barons” or some such. (They might have been robber barons too I guess, IDK.)
Also worth noting that the miners weren’t even in San Francisco - they were 100+ miles to the east in the Sierra foothills. I suspect they washed their own clothes in the river, when they washed them at all.