I have read all the posts regarding Peru level 7 and have not seen an answer to the upper left hand corner pile not turning over. Did I miss it? If someone has an answer please post. It's very frustrating!!

I just started playing JQ 3 but on the first level of "Egypt" got stuck because I don't know how to uncover the hidden card. Any ideas? I feel a bit foolish because I'm sure the solution is easy!!