If one admits that writing (and the mark in general) must be able to function in the absence of the sender, the receiver, the context of production etc., this implies that this power, this being able, this possibility is always inscribed, hence necessarily inscribed as possibility in the functioning or the functional structure of the mark...It follows that this possibility is a necessary part of its structure...Inasmuch as it is essential and structural, this possibility is always at work marking all the facts, all the events, even those that appear to disguise it. Just as iterability, which is not iteration, can be recognised even in a mark that in fact seems to have occurred only once. I say seems, because this one time is in itself divided or multiplied in advance by its structure of repeatability
Jacques Derrida, Limited Inc (1988)
In the Absence of the Sender
Pencil crayon and watercolour on postcards, mailed daily for two weeks.