Thank you to everyone who responded. We obtained the information that my GF filed his Declaration of Intent from some documents found at Footnote.com. The U.S. Government investigated my GF during WWI because he was a vocal proponent of Croatia remaining under Austrian rule. The file is available at the footnote website including the comment that he had filed his Declaration of Intent. A while back and prior to obtaining the information at Footnote, I contacted someone with the NARA region where my GF lived in the western US, but he referred me to NARA headquarters in Washington. Someone in Washington then conducted a search but found nothing. I will be able to spend a day or day and a half at NARA headquarters next week, but have so much to do that I did not want to spend a lot of time looking for the "Intent" papers if there was little chance they are there. Based on the replies, it appears there is, at least, a possibility I might have some success. However, If I do not find them in DC, I can't think of a better excuse to visit the beautiful state of Montana. Thanks again. Sarah