An advertisement by J. Burns in the November 28th, 1873 edition of The Medium and Daybreak offering reproductions of famous spirit photographs for sale for the price of 1 shilling each.
The following photographs by Frederick A. Hudson are listed as available:
Burns, Mrs. (with “John King”)
Guppy, Samuel (with Hudson’s first spirit-photo)
Gregory, Mrs. Makdongall (with spirit of sister)
Howitt, William (with child)