Prowling through Google Books, I found an interesting volume: JUDICIAL AND STATUTORY DEFINITIONS OF WORDS AND PHRASES COLLECTED EDITED AND COMPILED BY MEMBERS OF THE EDITORIAL STAFF OF THE NATIONAL REPORTER SYSTEM (1904). West’s National Reporter System is private publishing concern that compiles and organizes for easy reference, state and local legal decisions. Begun in 1879, it continues to this day (a part of Westlaw). What follows is citations from legal decisions, not comments from the editors.
NATURAL BORN CITIZEN
Independently of the constitutional provision it has always been the doctrine of this country except as applied to Africans brought here and sold as slaves and their descendants that birth within the limits and Jurisdiction of the United States of itself creates citizenship. In the case of Lynch v Clarke (N. Y.) 1 Sandf. Ch. 583 Assistant Vice Chancellor Sandford said that he entertained no doubt that every person born within the limits and allegiance of the United States whatever the situation of his parents was a natural born citizen and added that this was the general understanding of the legal profession In re Look Tin Sing (U. S.) 21 Fed. 905, 909.
The term natural born citizen of the United States means all persons born in the allegiance of the United States. United States v Rhodes (U. S.) 27 Fed. Cas. 785, 789. The natural born subjects of a monarch comprise all persons born in the allegiance of the King United States v Rhodes (U. S.) 27 Fed. Cas. 785, 789.
Every person born within the United States its territories or districts whether the parents are citizens or aliens is a natural born citizen within the sense of the Constitution and entitled to all the rights and privileges pertaining to that capacity Town of New Hartford v Town of Canaan 5 Atl, 360, 364, 54 Conn. 39 (citing Rawle Const. U. S. p. 86). See also Lynch v Clarke (N. Y.) 1 Sandf. Ch. 584, 2 Kent, Comm. (9th Ed.); McKay v Campbell (U. S.) 16 Fed. Cas. 157; Field Int. Code 132, Morse Citizenship § 203.