I don't think BHO Sr was at Harvard yet in August of '61. He was still at U of Hawaii, and still an undergrad.
But closest POE to Boston would not be Baltimore. Likely it would be Boston's Logan Airport or failing that New York City.
Thanks...Why would Ed say next hint was Baltimore? Would Sr have picked up or dropped off applications for Grad school yet? They were still in the “honeymoon” stage of the marriage...He’d just taken her home to meet wife one and mother..... Would they have taken a honeymoon detour...Paris, London, NYC?
Do you know anything about this sight?
http://gov-reports.net/database-access.php?title=Immigration%20Records