These are instruments by which those who had declared their intention to become U.S. citizens and had resided in the U.S. continuously for 5 years made formal application for U.S. citizenship. The data given includes name, residence, occupation, date and place of birth, citizenship, and personal description of applicant; date of emigration; port from which applicant emigrated and port of arrival in U.S.; marital status; names, dates, places of birth, and residence of applicant's children; date at which U.S. residence commenced; time of residence in State; name change and signatures. Copies of declarations of intention, certificates of arrival and certificates of citizenship classes are often interfiled with petitions.