Records are held at various repositories :-
The Cornwall Record Office in Truro is where the church registers are lodged, as well as many other documents. The search engine on the National Archive site, www.a2a.org.uk is useful for looking up the document references before your visit.
The Courtney Library at the Royal Cornwall Museum in Truro
A selection of old maps can be viewed atwww.old-maps.co.uk
St Austell Poor Law Union was formed on 2nd February 1837, the story of the workhouses can be found at www.workhouses.org.uk
Tracing your Cornish Ancestors
David Stick is the Online Parish Clerk (OPC) for Tywardreath. OPCs are volunteer genealogical researchers helping people to find their family connections at no cost. He is a member of Cornwall Family History Society where you can see the sort of things that are possible. If you would like David to advise you, please email him.