Hughes, Hugh Price, Wallace's opinion of, ii. [204]

—— letter from, on Wallace's "Justice, not Charity," ii. [157]

Humboldt's "Personal Narrative," i. 17, 164, 238

Humming-birds, ii. [23], [24]

Huxley, T.H., i. 1, 5, 76, 116, 137;
meets Wallace, 35;
appreciation of Wallace, 94;
first interview with Darwin, 104;
and Herbert Spencer, 123;
and the memorial to Gladstone as to a pension for Wallace, 313;
and psychical research, ii. [198];
opinion as to Wallace joining Royal Society, [220];
on Henslow, [251]

—— letters from, declining Wallace's invitation to investigate
"curious phenomena," ii. [187]-8

Hybrids, sterility of, i. 130, 195 et seq.;
and Natural Selection, 195 et seq.;
infertility of, 297

Hyder, Mr. J., ii. [161], [252]

Hyndman, Mr. H.M., letter from, acknowledging Wallace's birthday congratulations, ii. [164]

I