Before attempting a visit, be warned that I&StP is the largest cemetery in the UK, so large that they provide a minibus to take people around. Also that as the Find A Grave page says, it's overgrown in places. So don't expect to wander in and straight up to the grave! You'll need a plot number, which is available for a fee from deceasedonline (where his surname is transcribed as Purdy) but I don't have a sub. In fact, the fee privides a register scan, which, if you're lucky and it's organised by graves rather than dates and he's not at either end of a page, will answer your question anyway.
