Hi Karen The best way for you to get back further is to get a birth certificate for one of Walters children. This will give you a maiden name for Walters wife Harriet. With this information you could get a marriage certificate which will show both fathers if Walters mother was single then no father will be shown or then again it might !! You said they married in Devon in 1857 do you have a certificate I only query it because there appears to be no obvious link to that area of the country and Harriet was born in Surrey. There is a lot of Devon Blaxalls but I dont know if that marriage is connected to them rather than your branch If you want any advice on how to go about getting certificates email me direct and I can let you know how to go about it. By the way what part of the world are you from ? Got to go children need feeding again !!! Best wishes Angela