Gerald le Grys Norgate, Dictionary of National Biography (1901)
“ While at Calcutta Campbell devoted much time to his favourite study of ethnology. After a long tour in India in 1864-5 he published 'The Ethnology of India' and a pamphlet called ' The Capital of India, with some particulars of the Geography and Climate of that Country,' 1865, in which Nassik, near Bombay, was recommended as a suitable site for a new capital. In 1866 he visited China, and on his return was sent to Orissa as head of a commission to report upon the causes of the recent severe famine (the most serious in Bengal since 1770) and the measures taken by the local administrators. ”
