I would like to know if an immigrant from Norway came though Castle Garden in 1856 by the name of Thomas Thompson? He might have been accompanied with Christina Michille

I found this: "The free CastleGarden.org database, provided online by the New York Battery Conservancy, allows you to search by name and time period for immigrants who arrived in Castle Garden between 1830 and 1890." Hope that helps! Although a bunch of records were destroyed in a fire, so you might not find what you're looking for.

Well, visit the Castle