How do I locate ship manifestos and passenger lists from the 1860s-70s?

by buenolosbuenos

I've tried Google, doesn't work for me. I'm probably missing something though. Anyone have any thoughts or ideas? What I'm looking for, the man came from Germany and all my research leads me to believe he landed in Baltimore in the time period posted above.

macoafi

Ancestry.com has an awful lot of them if you've got a name to look for.