Thanks for the response, my mother is a Manners, we descend from the 2nd Duke and I still live in the Grantham (south Lincs) area. I have worked on the Manners and Tollemache family histories for the last 6 years, and have listed over 3000 individuals for the Manners and 1700 for the Tollemaches.
I have always intended to display my work on the web but never seem to have the time, so I can only give you the information in snippets, please let me know your email address.
Information for the Wiltshire Manners families were published in a book By Gladys E Manners called I think “A passage of no return” she too shared this line of descent. It lists many of the Manners who live in Australia and is available through the library, this source can be a great help to many looking for the Manners family history who live in Australia.