This was because certain gases suggested a supernatural origin, such as from their ability to cause death, extinguish flames, and to occur in "mines, bottom of wells, churchyards and other lonely places".
Ini karena gas tertentu menggambarkan asal mula supernatural, seperti dari kemampuan mereka menyebabkan kematian, memadamkan api, dan terjadi di "tambang, dasar sumur, halaman gereja dan tempat-tempat sepi lainnya".