Semaphore was an early form of texting in which people waved flags at each other. Hillsides were full of them. Wales, in particular, was a nightmare.
Attempts are now being made to revive semaphore. However,
as flags are no longer freely available, experts have
suggested that fish would make a suitable alternative for
By this, they mean large fish such as salmon and pike, not
tiddlers like sticklebacks, anchovies and whitebait. That,
frankly, would be ridiculous.
A typical conversation is shown below.