This week's featured database is one I'm really excited about having online. It is the J & J Cooke Shipping Agents Records 1847 - 1871.
These lists can be found in D.2892/1/1-14 Passenger Books of J & J Cooke, Shipping Agents. Sailings were from Londonderry to Philadelphia Pennsylvania, Louisiana, Quebec, and St. John New Brunswick between 1847-1871 in the PUBLIC RECORD OFFICE of NORTHERN IRELAND.
Luckily for researchers, Olive Tree Genealogy volunteers kindly began transcribing these lists. Many are now online and searchable at Ships' Lists Online
If you are looking for Irish ancestors, especially those coming to Canada, you may be in luck with the JJ Cooke Shipping Lists, because Canadian Ships Passenger Lists did not have to be archived until 1865. This gives researchers those important pre-1865 years.