My Shaykh Abdur Rahman al-Mu’alami -Rahimullaah- would research a very great deal.  He would research into more than one book at one time.  I would sit with him in the library of the Haramain, and he would give me books and say ‘look for such and such thing.’ But I could not find it, when I would give them back he would say to me: ‘Here it is, where are you?’  This was in the year 1367 A.H. at that time I was not paying attention and being hasty.