Post office directory; or, business man's guide to post offices in U.S., containing names of post offices and post masters in U.S. on 1st of July, 1856, arranged by States and counties; exhibiting revenue of each office for year ending June 30, 1855, and thus at glance showing business importance of every town; with information in regard to rates of postage to inland and foreign places, franking privilege, and other matters of interest to citizens generally; containing also comprehensive codification of existing postal laws.