Up until about the 1940s, country folks in the Tri-States decorated graves with lightning whelks, having no idea they were continuing the ancient Indian tradition of using this shell to symbolize the sacred left hand swirl. https://www.news-press.com/story/life/outdoors/2015/07/18/lightning-whelk-calusa-bailey-matthews-museum-bill-marquardt-jose-leal-tropicalia/30299339/