Xo Ho = Horace Walpole. Reproduction of original from the British Library. Available online to authorized PSU users as part of the Social sciences and fine arts series of Eighteenth century collections online.
Electronic reproduction. Farmington Hills, Mich. : Thomson Gale, 2003. Available via the World Wide Web. Access limited by licensing agreements
Hazen. Walpole, 9 English Short Title Catalog, ESTCT37986.