Come on, man. By that definition, almost everyone would be illegal. The law didn't change until 1921 that would have any effect on immigration from Slovakia. Birthright citizenship applied because your ancestor was here legally. That is not the issue with anchor babies. Those are just a gross misinterpretation of the 14th Amendment. "And subject to the jurisdiction thereof" means that people who are still subjects of another nation (such as travelers, diplomats or illegal aliens) are excluded from birthright citizenship.