"Interesting you use novels to back up your assertions. I suggest you add Hans Christian Andersen's collected works to your list!"

Gobineau, Morton, Linnaeus, and Agassiz weren't novelists, although they created the fictional explanation of racial differences called polygenism--that the races were descended from different, unequal, and unrelated origins.

Neither was "John Beddoe, who later became the President of the Anthropological Institute (1889-1891), [who] wrote in his Races of Britain (1862) that all men of genius were orthognathous (less prominent jaw bones) while the Irish and the Welsh were prognathous and that the Celt was closely related to Cromagnon man, who, in turn, was linked, according to Beddoe, to the 'Africanoid'."--Anthony Wohl, Racism and Anti-Irish Prejudice in Victorian England.

Disraeli, of course WAS a novelist, but he could have put his literary imagination to better use than to write

"[The Irish] hate our order, our civilization, our enterprising industry, our pure religion. This wild, reckless, indolent, uncertain and superstitious race have no sympathy with the English character. Their ideal of human felicity is an alternation of clannish broils and coarse idolatry. Their history describes an unbroken circle of bigotry and blood."
Wikipedia: Anti-Irish Sentiment