There are between five and six hundred library buildings under the Public Library Acts in this country, and with few exceptions each contains a lending library, and some hardly anything else. A corollary of this distributing service is the branch library. Liverpool had two branches by 1853, and other towns quickly followed suit. A very large proportion of these buildings are branch libraries, established so as to bring a stock of books for lending as near as may be to your door. To-day, the biggest provincial cities have each from a dozen to a score such district libraries; the average town or metropolitan borough has two or three. Some places are content with delivery stations; some have these and branches as well. The delivery station is a device for bringing books that have been asked for from the central reservoir to the nearest point, and is a convenience to readers who have not the time, or do not think it worth while, to visit the library in person. Given a first-class catalogue and intelligent readers, the delivery station is a useful makeshift. But there are weighty reasons why it is much better to invite Mahomet to the mountain--why a service through district libraries will have more valuable results than one through delivery stations. The best systems combine the advantages of both methods, making the reader free of all the branch libraries in a town, with the right of direct access to the book-shelves, and at the same time bringing books from other branches to the one nearest the reader who is unable or finds it inconvenient to visit the library in person. Manchester and Glasgow, for example, have a motor-service whereby all the books in a score of district libraries are pooled as one vast stock, accessible, with a minimum of expense, difficulty, or delay, to the borrowers situated at any point in the civic area. Make your library area big enough, and you can provide the maximum of opportunities at the minimum cost.