Top Tips For *Managing Your Carrier Pigeons *from the Imperial War Museum
https://www.iwm.org.uk/history/top-tips-for-managing-your-carrier-pigeons
Top Tips For Managing Your Carrier Pigeons

Carrier pigeons were used during the First World War to relay information when other methods of communication were not possible. Pigeons were used on land, sea and even in the air, some travelling up to 100 miles through dangerous conditions to deliver important messages back to headquarters and bases.

Imperial War Museums
@simon
This is fantastic.
Thank you.