We have received several communications advocating card directories in our dormitories. One communication suggested in addition the placing of boxes beside the cards for the reception of letters and visitors' cards. We sympathize with the first step of the reform, as set forth by our correspondent of to-day, but not with the second, the boxes. Even to college students a card directory would be a great convenience. We frequently wish to look a fellow up, whom we know rather well, have met on many occasions, but we haven't an idea where his room is. Or there is a friend whom we have often seen entering and issuing from a certain entry; he has often asked us up to his room No. -. But for the life of us, when we go to see him, we cannot remember what number he told us. Or again memory plays us false, and we do not feel sure enough to knock at a door which we have opened time and again. In all these cases, we are left hopelessly nursing our memory in the hall or in the Yard, with no alternative but to seek the information in our room or at some store. Then we retrace our steps, - possibly to the same building and the same door. The service of a card directory in such emergencies and they are not infrequent - is obvious.