CHAPTER VI. Cambridge--Dr.Whewell--Table conversation--Professor Challis--Professor Adams--Customs--Professor Sedgwick--Caste--King's Chapel--Fellows-- Ambleside--Coniston waters--The lakes--Miss Southey--Collingwood--Letter to her father--Herschels--London rout--Professor Stokes--Dr. Arnott--Edinboro'-- Observatory--Glasgow observatory--Professor Nichol--Dungeon Ghyll--English language--English and Americans--Boys and beggars.