Hi,
I have not found anything else on Mill Bank but I did find this which might be of interest for you

.
[PDF] BUTTERWORTH HALL IN 1840.' CHAPTER XVII. bfd J5ouaea and ecd ... File Format: PDF/Adobe Acrobat - View as HTML
WICKEN HALL. None of the houses in the Haugh or Ogden are of very great antiquity, a large portion of the land being waste and common until comparatively ...
www.link4life.org/.../C542D176-B771-B43F-7265D85A9CF9133E.pdf - Similar
Sorry I can't get the link to work

but if you "Google" Wicken Hall, Ogden and look for something like the above in the results you will have not trouble finding it and the link should work from Google
It is an extract from a book about old houses and old families and on page 46 of the PDF it does mention Wicken Hall and the Ainsworth family.
Just thought it would be of interest.
Luzzu