I do not remember to have met with any travellers into high Northern latitudes, who remarked their having heard the Northern Lights make any noise in the air as they vary their colours or position; which may probably be owing to the want of perfect silence at the time they made their observations on these meteors. I can positively affirm, that on still nights I have heard them make a rustling and crackling noise like the waving of a large flag in a fresh gale of wind.