So Many Clues You Can Follow to Find an Ancestor's Immigration in USA or Canada

Olive Tree Genealogy received a request from a reader (Hillary M.) of my AskOliveTree blog.

Because my answer covers so many generic research suggestions I thought it might be helpful to post it here. I have edited the query as follows:

Dear Olive Tree,



I need assistance locating
immigration/migration records for my gr-gr-grandfather Henry Arthur
Bolton and my gr-gr-grandmother Emily