It was the great anxiety of her official friends that she should not outlive her powers: her influence generally was so great that to them the thought of this was distressing. They were always very solicitous about her health, writing to her frequently to say that she should take life more easily, "Take care of yourself, Ma--as much as you can." "Don't be so ridiculously unselfish." "Learn a little selfishness--it will do you all the good in the world," was the advice showered upon her. When she had the Court work she was often urged to take a month's holiday. On hearing of her intention to go to Ikpe one wrote, "Dear Lady, I hate the idea of your going so far into the bush. Don't go. There are plenty of men willing and eager to be of service to you, but away up there you are far away from help or care." Another warned her against the people; "But," he added, "we know you will go in spite of it--and conquer!" Latterly they became more importunate. "Do be careful," one wrote. "Do take quinine and sleep under a net and drink filtered water." Her custom of going hatless into the blazing sunshine was long a sore point, and when they failed to persuade her of the danger, they resorted to scheming. "We know why you do it," they said artfully. "You know you have pretty hair and like to display it uncovered, imagining that it gets its golden glint from the sun. Oh, vanity of vanities! Fancy a nice, quiet missionary being so vain!" Certainly no argument could have sent her more quickly to the milliner's. IX. POWER THROUGH PRAYER The power which enabled Mary Slessor to live so intensely, to triumph over physical weakness, and to face the dangers of the African bush, and gave her the magnetic personality that captivated the hearts of white and black alike, was derived from her intimate and constant contact with the Unseen, and the means of that contact were prayer and the Bible. She had an implicit belief in the reality of prayer, simply because she had tested its efficacy every day of her life, and had never found it to fail. When her old friend, Mr. Smith of Dundee, asked for her testimony to include in his book, _Our Faithful God: Answers to Prayer_, she wrote: