In the aforementioned essay I only touched upon, but in no way exhausted, the varieties in the relations and meanings of concealed memories. In the given example fully analysed I particularly emphasized a peculiarity in the temporal relation between the concealing memory and the contents of the memory concealed by it. The content of the concealing memory in that example belonged to one of the first years of childhood, while the thoughts represented by it, which remained practically unconscious, belonged to a later period of the individual in question. I called this form of displacement a retro-active or _regressive_ one. Perhaps more often one finds the reversed relation--that is, an indifferent impression of the most remote period becomes a concealing memory in consciousness, which simply owes its existence to an association with an earlier experience, against whose direct reproduction there are resistances. We would call these _encroaching_ or _interposing_ concealing memories. What most concerns the memory lies here chronologically beyond the concealing memory. Finally, there may be a third possible case, namely, the concealing memory may be connected with the impression it conceals, not only through its contents, but also through contiguity of time; this is the _contemporaneous_ or _contiguous_ concealing memory. How large a portion of the sum total of our memory belongs to the category of concealing memories, and what part it plays in various neurotic hidden processes, these are problems into the value of which I have neither inquired nor shall I enter here. I am concerned only with emphasizing the sameness between the forgetting of proper names with faulty recollection and the formation of concealing memories. At first sight it would seem that the diversities of both phenomena are far more striking than their exact analogies. There we deal with proper names, here with complete impressions experienced either in reality or in thought; there we deal with a manifest failure of the memory function, here with a memory act which appears strange to us. Again, there we are concerned with a momentary disturbance--for the name just forgotten could have been reproduced correctly a hundred times before, and will be so again from to-morrow on; here we deal with lasting possession without a failure, for the indifferent childhood memories seem to be able to accompany us through a great part of life. In both these cases the riddle seems to be solved in an entirely different way. There it is the forgetting, while here it is the remembering which excites our scientific curiosity.