I Enjoyed Studying It Too
Sort of morbid in a way but interesting, isn't it?
Many years ago (when I was a bit depressed) I read a number of world histories on burial and memorial practices. One book was about these mortuary and "salon" photos during the Victorian era. I recall they were popular in the Wild West of the USA to verify a kill by bounty hunters so they could claim their rewards.
Photograpic technology was a new and exciting phenomenon at the time as was publishing so there was an unusually high demand for pics of all types including those of a questionable nature.
(In the old times bodies were "waked" at home in the salon, or living room of a house. Women typically prepared the corpse for viewing. ) Cool group idea.