Richardson-Angel-Feigon-Cohen et al

I am currently researching my own biological relatives, including Richardsons, Angels, Seymours, Carpenters and others, but will eventually also be looking for Feigons and Cohens. I have already discovered that some of my family appears in Volume 1 of the World Family Tree. At the moment I am stuck finding more about Eliza Isaacs, wife of John Angel and mother of Samuel Angel, my great-grandfather (in England). I also want to learn more about Mary Seymour, born in NY around 1865.