[111] In succession to Sir William Mansfield (Lord Sandhurst). On his return from India Lord Sandhurst came to see Miss Nightingale (July 8, 1870), and they corresponded afterwards. [112] Of Lord Lawrence and Sir Bartle Frere, Miss Nightingale wrote to Madame Mohl (March 26, 1869): "You can ask Sir Bartle Frere about Sir John Lawrence if you like. But they are so unlike, yet each so roundly perfect in his own way, that they can never understand each other--never touch at any point, not thro' eternity. I love and admire them both with all my mind and with all my heart, but have long since given up the slightest attempt to make either understand the other. But each is too much of a man, too noble, too chivalrous, to denigrate the other." [113] The substance of much of her Memorandum to Lord Mayo was embodied in the "Observations" which she contributed to the Indian Sanitary Blue-book, 1869-70; see especially p. 43. Meanwhile, Lord Mayo had introduced Dr. J. W. Cunningham to Miss Nightingale, and they became great allies. When he returned to resume his duties as "Sanitary Commissioner with the Government of India," he corresponded with Miss Nightingale regularly, telling her where things were backward and where a word in season from her would be helpful. In every question she took the keenest interest, sparing no pains to forward, so far as she could, every good scheme that was laid before her. In 1872 Mr. W. Clark, engineer to the municipality of Calcutta, came to see her about great schemes of water-supply and drainage. She obtained an introduction to Sir George Campbell, the Lieutenant-Governor of Bengal, in order to commend to his notice Mr. Clark's plans. For many years she was thus engaged in correspondence with sanitary reformers and officials in various parts of India, sending them words of encouragement when they seemed to desire and deserve it, words of advice when, as was frequently the case, they invited it. When such officials came home on furlough, most of them came also to Miss Nightingale. Dr. Sutherland, in his official capacity on the War Office Sanitary Committee, would often see them first; he would then pass them on to her, dividing them into two classes: those "whom you must simply lecture" and those "whose education you had better conduct by innocently putting searching questions to them." Miss Nightingale was never backward in filling the part of governess to those who in sanitary matters governed India. VI