Of course, when Julia and Barnabas (and later Eliot) went back to 1840, they once again threw the whole time sequence out of whack. Edith didn't even survive to make it to 1897 where she became Grandmamamamama. But let's say the time-line followed as it was suppose to, sans Julia, Barnabas and Eliiot. I could then see Daniel passing the secret onto his daughter-in-law, Edith, rather than his son, knowing what a flakey-flight he was. That, of course, doesn't resolve the situation that Edith wouldn't be around in 1897 when Julia, Barnabas and Eliot travelled......oh, you know what I mean.
Gerard