cemetery gate puzzle

I have all four tiles now, but when I go to switch the tiles to complete the puzzle, it keeps saying "I don't have a clue what to do", frankly neither do I! What the heck am I doing wrong.....help. Thankyou

You need to find the clue. Do you have the mysterious paper? It needs to be warmed with candle light to reveal the hidden clue.

Where do the other two tiles come from because I am stuck on this puzzle too.

I followed the strategy guide to the letter.

any help would be gratefully accepted.

no1liony