The following entries appeared when doing a search for William Borlase death certificate on http://www.freebmd.org.uk/cgi/search.pl

Deaths Mar 1899
BORLASE William 62 St Austell 5c 83
Deaths Jun 1899
Borlase William Copeland 50 St. Giles 1b 359
Borlase William Thomas 12 Bodmin 5c 47
Deaths Dec 1906
BORLASE William C 82 Newton A. 5b 64

I don't know if that helps at all?