Hi Malcolm,
if you contact Burnley library with the info you have about when they died (
http://www.lancashire.gov.uk/libraries- ... brary.aspx) they should be able to check the burial records for you to confirm if they are buried there.
The chapel has been demolished, there are photographs of the demolition
http://briercliffesociety.co.uk/Photo%2 ... lition.htm but also photographs from when it was standing
http://briercliffesociety.co.uk/Photo%2 ... t%20ChapelIt is possible that the chapel may be able to provide you with details - I'm not sure but their details can be found on this site
http://www.haggatebaptistchurch.org.uk/welcome.htm Good luck, let us know how you get on.