I've been in this country 30+ years with an indefinite green card but never really bothered to fill out the papers -- I know, I know, let's not go there now. One question on the N-400 form asks about all my travels since I was admitted to the country. I have gone through a few passports since then and they were not stamped every time so consequently I have spotty documentation of all travels but the most recent. Would a supplement explaining this suffice? I am really interested to know as I am ready to file the papers. Thanks!