Mr. Herbert Spencer 29 
Memory, then, pertains to all that class of psychical states 
which are in process of being organised. It continues so long 
as the organising of them continues ; and disappears when the 
organisation of them is complete. In the advance of the corre- 
spondence, each more complex class of phenomena which the 
organism acquires the power of recognising is responded to at 
first irregularly and uncertainly ; and there is then a weak re- 
membrance of the relations. By multiplication of experiences 
this remembrance becomes stronger, and the response more 
certain. By further multiplication of experiences the internal 
relations are at last automatically organised in correspondence 
with the external ones ; and so conscious memory passes into 
unconscious or organic memory. At the same time, a new and 
still more complex order of experiences is thus rendered appre- 
ciable ; the relations they present occupy the memory in place 
of the simpler one; they become gradually organised ; and, 
like the previous ones, are succeeded by others more complex 
still (p. 563). 
Just as we saw that the establishment of those compound 
reflex actions which we call instincts is comprehensible on 
the principle that inner relations are, by perpetual repetition, 
organised into correspondence with outer relations ; so the 
establishment of those consolidated, those indissoluble, those 
instinctive mental relations constituting our ideas of Space 
and Time, is comprehensible on the same principle (p. 579). 
In a book published a few weeks before Mr. Spencer’s 
letter appeared* I had said that though Mr. Spencer at 
times closely approached Professor Hering and “ Life and 
Habit,‘ he had nevertheless nowhere shown that he con- 
sidered memory and heredity to be parts of the same story 
and parcel of one another. In his letter to the Atheneum, 
indeed, he does not profess to have upheld this view, 
except ‘‘ by implications ;’’ nor yet, though in the course 
of the six or seven years that had elapsed since “ Life and 
Habit ” was published I had brought out more than one 
book to support my earlier one, had he said anything 
during those years to lead me to suppose that I was tres- 
* “Selections, &c., and Remarks on Romanes’ ‘ Mental [ntelli- 
gence in Animals,’ Triibner & Co., 1884, pp. 228, 229, [Out of 
print.] 
