Looking at it from a what is available or what we can make standpoint...
Fireworks are available, or can be made from surprisingly common material so an audio or light signal could be made.
Flare pistols actually date back to 1790s or so, and if community is near a lake or river, then there is a chance of a boat flares or signal whistles.
Local band may have access to a trumpet, I checked with a Civil War re-enactor buddy and he states that bugle calls could be heard 2-3 miles in still air.
|