A Kweskin cousin contacted me to say that you can use the Ellis Island website to research passengers. Visit http://www.ellisisland.org/, choose the passenger search function, type in your search term and you're on the way to accessing some pretty remarkable information. The site is free, you just need to register.
You can see the names of passengers, residence, year they arrived, their age, view their passenger record, ship manifest and even a ship image. The documents, which are PDFs of original records, can be purchased on the site. Breathtaking.