Civil War Times Magazine - This detail from “A Manual of Signals” by Albert Myer shows his signal system of using flags, which became know as the "wig wag" system. Myer, using
Sign & Signal for Scouting Scouts
Wigwag (flag signals) - Wikipedia
Wig Wag Pre School Programs | Rosenberg Railroad Museum
Science Notebook - Gilbert Signal 1
Wig Wag Signals and Wigwagging
CODE FOR SEMAPHORE SIGNALLING | Semaphore, Girl scouts history, Scouting for girls
Scoutmaster Bucky's Signs, Signals, and Codes Cipher Wheel