…As you know, I am working on the assumption that our psychical mechanism has come into being by a process of stratification: the material present in the form of memory-traces being subjected from time to time to a re-arrangement in accordance with fresh circumstances-to a re-transcription. Thus what is essentially new about my theory is the thesis that memory is present not once but several times over, that it is laid down in various species of indications. I postulated a similar kind of re-arrangement some time ago (Aphasia) for the paths leading from the periphery [of the body to the cortex].5 I cannot say