Wireless communications were still in their infancy, so the available methods were telephone, telegraph, semaphore, signal lamps, signal flares, homing pigeons and runners.
Apart from the homing pigeon, man has the cybernetic instinct to follow through a direction -- but you've got to make use of it by getting a focus for oneself.
The homing pigeon was one of the first ways lovers were able to communicate over long distances, using the birds to transmit small messages to one another.
