Analysis of information sources in references of the Wikipedia article "Taney County, Missouri" in English language version.
Then came the contractors with their hundreds of horses, their powerful machines for moving and piling stone and earth, their great camp of men, Irishmen for foremen, Austrians, Italians and negroes, the last most woefully unwelcome in these two counties, where no negroes have been allowed to live for many years.