I think it might be this: https://en.wikipedia.org/wiki/Message_stick https://en.wikipedia.org/wiki/Message_stick https://www.ancient-origins.net/ancient-plac

I think it might be this: https://en.wikipedia.org/wiki/Message_stick https://en.wikipedia.org/wiki/Message_stick https://www.ancient-origins.net/ancient-places-australia-oceania/aboriginal-message-sticks-and-ancient-system-communication-001670 https://www.ancient-origins.net/ancient-places-australia-oce...