Question

What does me frank find in the secret room Anne frank

Answer 1

I am assuming that you are asking about Mr. Frank. He finds the secret room when he returns at the end of the war.

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Answer 2

He received a letter informing him that his daughters died at Bergen-Belsen. When he returned home Miep gave Anne's diary to Otto. She hid Anne's diary after the Franks' arrest, hoping to return it to Anne. I'm assuming that's what he found!