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not known to them. So the phenomena of somnambulism, at first 
fiercely disputed, and their assertors denounced as knaves and 
dupes, have come to be accepted as substantially true. But then 
they were declared not to be new truths, but to have been familiar 
to every physiologist and psychologist, under other names, such as 
hysteria, or hallucination; and now they have taken their place 
among the recognised incidents of a rare condition of the nervous 
system. At this point they were, until lately, almost dismissed 
from notice. Their relationship to Psychology seems not to have 
occurred to the physiologists and physicians—with very rare 
exceptions. They had not the curiosity to enquire what was the 
meaning of these strange, and, according to the laws of physical 
science, utterly inexplicable phenomena. What light, if any, they 
throw upon the mysteries of the mind and soul, the scientists have 
not paused to enquire. Is it that they fear to ask, lest the answer 
should be fatal to their favourite materialism? or is it that their 
faith in materialism is so firmly fixed that they deem it a waste of 
time even to listen to evidence on the other side? Whatever be 
the cause, while the facts and phenomena of somnambulism have 
been reluctantly accepted, their value in revealing the mechanism 
of man, and the manner of its action, has been grudgingly admitted, 
and to this moment has been but partially employed for the 
purpose of that knowledge of himself which is the highest and 
most important object of human research. 
ANIMAL INTELLIGENCE. 
By the exercise of what power do animals find their way back 
to distant places from which they have been removed? It has 
been surmised that man may have once possessed this power, but 
that he has lost it in the process of evolution. The suggestion, 
whether true or not, throws no light whatever on the matter. No 
explanation worthy of the name has ever been attempted ; and we 
must confess that in our present state of knowledge, we are unable 
to conceive or realize the power they possess. One thing only is 
tolerably certain—the knowledge of topography necessary to them 
