=Sources through Which Calls are Received.= The nurse goes to the patient’s home, in the first instance, at the request of some one who has sent her. This may be a physician, a dispensary, a neighbour, or she may even go on her own shrewd suspicion that some one is ill. When the door is opened to her knock, she must be careful how she explains her coming. If a municipal nurse, she should never say that she has come from the Health Department, for this conveys a suggestion of authority which is often most alarming. Since the patient has been referred to the Health Department from one of the sources just mentioned, it would be more tactful to name the agency through which the call was received. When calls are anonymous, such as by letter or telephone message, or when the sender gives his name but asks that it be withheld from the patient, the task of gaining an entrance is often one of considerable difficulty, and requires much strategy. Calls of this sort should never be refused, since in this way many advanced cases are brought to light. It is also a wholesome indication that the community is learning to take an intelligent interest in an infectious disease, whose presence is recognized as a menace. These cases can best be managed if the nurse assumes the responsibility herself, saying that in a roundabout way she has heard that there is illness in the house, and so has called to offer her services. As a rule, her offer will be readily accepted, for a case reported in this manner is usually advanced, and, as we have said before, when the neighbours diagnose tuberculosis, they are frequently right. =Entering the Home.= As a rule, when a nurse presents herself at a house and explains her errand, the door is opened wide and she is cordially asked in. In some instances, it is held half-shut, in a dubious manner, and she is admitted with reluctance. Sometimes it is banged in her face. It is a great satisfaction to gain an entrance into homes of the latter class; to win the confidence of such patients is a victory worth having. The surest formula for entering all homes is a broad smile; to stand on the doorsteps and grin like a Cheshire cat disarms suspicion, and once across the threshold, the victory is won.