I am trying to find immigration records for my great grandparents. Herman and Gretchen(sometimes called Margaret) Bottjer left Germany in Oct or Dec 1889, so I'm guessing they arrived in 1890. They left with two children, though one died on the voyage and was buried in Baltimore, MD. I have not been able to find a naturalization record, ships passenger list, or any immigration record. Maybe I just dont know where to look. He was born in 1864, and she was born in 1866. Both in Hanover Germany. Any help or advice would be greatly appreciated. Thank You.