Tomb of Princes Easy Secrets

[B_Diane_Landon]

OK PLEASE help. I have played this TOP easy many times. Every time I get 12 secrets. From reading your posts I think the 13th is left of the long pole on the far right of screen. But is it at top of pole or bottom? I have guessed it may be beneath room 502 or 503 but have not found any way to get into it. I cannot die without 100 % on all levels. I will be 69 in a couple months. Take pity. Give me another clue. Thank you.