Forty, Adrian & Kuchle, Susanne (eds) The Art of Forgetting (New York: Oxford, 1999)

"'Come home, my boy', the Alzheimer ridden father implores his prodigal son, 'all is forgotten'. His confusion of forgiving with forgetting underscore the close etymological connection of amnesia with amnesty" (ix)

"The Western tradition of memory since the Renaissance has been founded upon an assumption that material objects, whether natural or artificial, can act as analogues of human memory. It has been generally taken for granted that memories, formed in the mind, can be transferred to solid, material objects, which can come to stand for memories and, by virtue of their durability, either prolong or preserve them indefinately." (2)

The dematerialisation of photography can be related to iconoclasm - the destruction of visual imagery and monuments. See 52 for a discussion of Yates, medieval memory and forgetting.
Memoria - things of the mental world have a necessary correspondence to things belonging to the moral and temporal world.
Mneme - the counterpart to memoria. The ability to remember by chance something previously experienced. (54)
The synaesthetic experience of remembering.
"We should consider the possibility that, rather than being the norm, the modern industrial economy with its attachment to material rather mental resources, may be the odd one out." (62)