Chapter 21

---- ---- ---- letters to Sir W.F. Barrett: on the nebular hypothesis, ii. 174; on Mars, 176; on experiments with sensitives and on prosecution of Slade, 197; on Dr. Carpenter, 198; regretting inability to attend Dublin meeting of British Association, 199; on the advocacy of vaccination, 206; on dowsing, 206-8; on presidency of Psychical Research Society, 208; on "Creative Thought" and on ministry of angels, 213; explaining his criticisms of "Creative Thought," 214-15

---- ---- ---- letter to F. Bates, on exotic insect-collecting, i. 69

---- ---- ---- letters to H.W. Bates: on Darwin's Journal, i. 25; on "Law regulating Introduction of New Species" and Ternate, 65; congratulating him on arriving home, 72; on Darwin, 73

---- ---- ---- letters to Mr. F. Birch: on "Mars," ii. 177; announcing conferment of Order of Merit, 223-4

---- ---- ---- letter to Mr. H. Jamyn Brooke, on monism, ii. 177

---- ---- ---- letters to Miss Buckley (Mrs. Fisher): on "Descent of Man," ii. 31-2; on physiology of ferns, etc., 40-1; on infinity of life-forms, 89-90; on house-planning at Broadstone, 119-20; on Turks, 153; on his "Reciprocity" article, 153; on the earth as only habitable planet, 175; on Spiritualism, 188-95; on psychical and other works, 203-4; on his visit to Switzerland, 204; on re-incarnation and theosophical writings, 205; on psychical research and Spencer's "Autobiography," 211; on conferment of Order of Merit, 222; on his autobiography, and Owen, 224-5; on reviews of "My Life," 225-6

---- ---- ---- letter to Mr. Sydney C. Cockerell, on Kropotkin's Life,