Phobias of all sorts are common in nervous children, and result from a morbid exaggeration of the instinct for self-preservation. Some cannot bear to look from a height, others grow confused and frightened in a crowd; dread of travelling, of being in an enclosed space such as a church or a schoolroom, or of handling sharp objects may develop into a constant obsession. I have known a little girl who was seized with violent fear whenever her father or mother was absent from the house, and she would stand for hours at the window in an agony of terror lest some harm should have befallen them. As if with some strange notion of propitiating the powers of darkness these children will often constantly perform some action and will refuse to be happy until they have done so. The same little girl who suffered such torments of anxiety in her parents' absence would always refuse to go to bed unless she had stood in turn on all the doormats on the staircase of her home. Other children feel themselves forced to utter certain words or to go through certain rhythmical movements. They fully understand that the fear in their mind is irrational and devoid of foundation, but they are unable to expel it. Often it is hugged as a jealous secret, so that the childish suffering is only revealed to others years afterwards, when adult age has brought freedom from it. We will do well to try by skilful questioning to gain an insight into the mental processes of a child when we find him showing an uncontrollable desire to touch lamp-posts or to stand in certain positions; or when he develops an excessive fear of getting dirty, or is constantly washing his hands to purify them from some fancied contamination. The treatment of all these symptoms calls for much insight. The child's confidence must be completely secured, and he must be encouraged to tell of all his sensations and of the reasons which prompt his actions. The nervous child has a horror of appearing unlike other children, and will suffer in silence. If his troubles are brought into the light of day with kindness and sympathy they will melt before his eyes. Even night-terrors are, as a rule, determined by the suppressed fears of his waking hours. If they are provoked by his experiences at school, by the fear of punishment or by dismay at a task that has proved beyond his powers, he should be taken away from school for the time being. Night-terrors are said to be aggravated by nasal obstruction due to adenoid vegetations. Clothing at night should be light and porous, and particular attention should be paid to the need for free ventilation.