Do you have the marriage date for Thomas Birchall and Ellen Pilling or their parents names. I have Birchalls on my dad's side and Pilliing's on my mum's side. (mums maiden name was Pilling) I have quite a bit of information on both names. do you have the 1881 census information if not let me and I will pass it on. If you let me know what information you have I will go through my notes to see if I can help.
PS it is Downall Green not Downham and yes it is very closs to Billinge.