Another kind of memory may be called, for want of a better name, the local memory. A person who has this strongly developed, if he once goes to a place, whether a room, or a street in a city, or a road in any part of the country, knows the way again, and can find it by instinct ever after. In the same way any one gifted with this almost unerring sense of locality, can find any book on any shelf in any part of a library where he has once been. He knows, in like manner, on which side of the page he saw any given passage in a book, which impressed him at the time, although he may never have had the volume in his hand more than once. He may not remember the number of the page, but he is sure of his recollection that it was the left or the right hand one, as the case may be, and this knowledge will abridge his labor and time in finding it again by just one half. This local memory is invaluable to a librarian or an assistant in shortening the labor of finding things. If you have a good local memory, you can, in no long time, come to dispense with the catalogue and its shelf-marks or classification marks, almost entirely, in finding your books. Although this special gift of memory--the sense of locality--is unquestionably a lower faculty of the mind than some others named, and although there are illiterate persons who can readily find and produce any books in a library which have often passed through their hands, yet it is a faculty by no means to be despised. It is one of the labor-saving, time-saving gifts, which should be welcomed by every librarian. The time saved from searching the catalogues for location-marks of the outside of books, will enable him to make many a research in their inside. This faculty, of course, is indefinitely strengthened and improved by use--and the same is true of the other branches of the sense which we call memory. The oftener you have been to any place, the better you know the way. The more frequently you have found and produced a given book from its proper receptacle, the easier and the quicker will be your finding it again.