Hi - Lancaster & Morecambe Family History Society have a project ongoing where they photograph and catalogue the exsisting gravestones at all the local churches. I know they have completed St Oswalds at Warton.
http://www.lancasterfamilyhistory.org.uk/files/wartonstoswald.htmOn the following link you will see that they have WILLIS Edith Curren, Ormond House.
On the site there is an email link - I would suggest contacting them and asking if you can have details, possibly the contact of the person who did the project at St Oswalds. I did that for one of the Lancaster graveyards and had some very positive help - regards Jackie