Were they own privately by the wealthy? Or were there carrier pigeons companies that worked almost as mail service? And how long did it take for the message to be received?
hi! You're raising new questions here which hopefully someone will be able to answer. Meanwhile, for anyone wanting the basics, see the FAQ
Communications - see under Carrier Pigeons
Also, I understand how the pigeon get back home but how did it know where to go? Was each pigeon specifically train to fly to and from two places?