13 MARCH 1875, Page 14

DOUBLE-BARRELLED BRAINS. [To THE EDITOR OF THE" SPEOTATOR."1 Sru,—May I

draw your attention to this passage in Dilke'S, "Greater Britain" (eh. xviii., ad fin.)?— " This evening, after five sleepless nights, I felt most terribly the peculiar form of fatigue that we had experienced after six days and nights upon the Plains. Again the brain seemed divided into two parts, thinking independently, and one side putting questions while the other answered them; but-this time there was also.a sort of half-insanity, a

not altogether disagreeable wandering of the mind, a replacing of the actual by an imagined ideal scene."