This little work on postal affairs aims to familiarize postal employes and others with the operations of the Post Office Department in all its varied and numerous details. No attempt was made to cover the wide field of postal activity and inquiry for which a much larger book and much greater space would be required. It is simply meant to be a book of reference, a sort of hand-book on postal subjects for busy people who may not care to read lengthy accounts or stories which a few paragraphs might sufficiently explain, or care to wrestle with columns of figures which are best given in official reports and chiefly valuable to public men for legislative purposes, for comparison and survey.