How to Find the Port of Departure on a Ships Passenger List

Sharon asked

I'm interested in finding out what port of departure my
great grandparents came from when they came to America in
March, 1888. They left Alsace Lorraine--Cologne, France
(at that time) and port of arrival was on March 17, 1888 in
Castle Garden.

AskOlive Answer: Sharon, if you have the passenger list for your ancestors, all you need to do is go to the first page of the list (manifest). That page shows details - Captain's name, date of departure, port of departure and so on. I use
Ancestry.com for their complete ships passenger lists but you may have access elsewhere.

Just as a little correction to your query - Castle Garden was not a "PORT". It was a processing station for immigrants used between 1855 and 1890 for ships sailing into the port of New York.