You may have noted that I’ve added a new link on my genealogy sidebar. In truth, I can’t believe I haven’t added this before now, for it’s really the mother of all genealogy sites.
Established and maintained by the Church of Latter-Day Saints (Mormons), it is probably the largest database in the world, and appears to be free to use. I was recently searching ancestors in northern England, and a gentleman there found some of what I was looking for on the IGI.
It does require you to set up an account, and the site can be quite intricate by the looks of it.
Good luck and happy hunting!