Another big ail was found inthe other widow. and the police stopped there. no one could get out of these window, they thought, because of the nail and because both widows were fastened on the inside. so they did not try to take out the nails and open the windows. but I went on thinking. the windows were the only possible way, so the murderer did escape from one of these windows. but they were fastened on the inside, and how did the murderer fasten the window again - from the out side? there was only one answer. the window could