I found the dagger along time ago. But the clock's puzzle? Maybe it's the answer. But I don't know how solve that ether. When I click on it just show me the clock with the key middle of it.
Well if my memory serves me well the key to solve thw clock mystery is depend on you, but i suggest to spam click everything inside your house and i mean everything including the paintings and sort of stuffs. Thats the key man spam click every item that you can see INSIDE of your home