Homing pigeons were a one-way service.
The pigeons would be taken to a place by horse/foot/etc.
When released they would fly home.
How did they know where home was?
[Same way animals do now](https://www.smithsonianmag.com/science-nature/how-do-birds-find-their-way-home-61927645/)
And yes, sometime something or someone would foul the fowl’s flight.
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