Cheap postage remarks and statistics on the subject of cheap postage and postal reform in Great Britain and the United States - Leavitt, Joshua 1794-1873 (Published for the Cheap Postage Association by O. Clapp, 1848)
Goldsmiths'-Kress no. 35878. - OCLC, 20032743. - Reproduction of original from Goldsmiths' Library, University of London