Will-o’-the-wisp. The lambent flames seen at night hovering over bogs and marshes. A popular phenomenon in many cultures and cropping up in literature, history and even in Sir Isaac Newton’s 1704 opus, Optiks. Commonly explained as ignited marsh gases. These flickers of light do seem to move and do not emit heat so . . . it is still questionable as to their true source. Spirited from the color yellow.