Jacquelyn,

Not sure if you're registered for reply updates (and apologies to other forum members for reviving a desperately old thread), but I've just written a long article about the disaster, including the key role your auntie played in it.

During my research for that article, I came across this post you'd made here, so in case it's still of use to you, you can read my findings here:

http://www.londonreconnections.com/2011/angels-and-errors-how-the-harrow-wealdstone-disaster-helped-shape-modern-britain/