Thank you for the review and the invitation to the Marcus Garvey Library. While doing some research into the history of scientific racism in the 19th century, I came across an article which includes several validations of your point about how the Irish were categorized similar to people of African descent, here is an excerpt:

IRISH CHIMPANZEES
“…In the 1860s, the debate among scientists about the relationship of humans to animals prompted British racists to make frequent comparisons between Irish people, Black people and apes. The Cambridge historian Charles Kingsley wrote to his wife from Ireland in 1860: "I am haunted by the human chimpanzees I saw along that hundred miles of horrible country...to see white chimpanzees is dreadful; if they were black one would not see it so much, but their skins, except where tanned by exposure, are as white as ours." (17.) “
http://www.nde.state.ne.us/SS/irish/unit_2.html

Allen L. Lee