A Printer's Colophon: Aelfric, A testimonie of antiqvitie (London: John Day, 1587)

        Colophons identifying printers and their locations were among the first marketing devices invented to help customers locate the source of printed book so that they could buy more of them.  Note the combination of type sizes, decorative devices, and other strategies for aesthetically improving the appearance of this "paratextual" page, a part of the printed book that has nothing to do with the text it contains other than to enhance its operation and/or appeal to the reader.  The date of completion, usually found on later printed title pages with the printer's city of origin, occurs with the ideal text's bindery "signatures" on the facing page.

Author Aelfric, Abbot of Eynsham
Title [A testimonie of antiqvitie : shewing the auncient fayth in the Church of England touching the sacrament of the body and bloude of the Lord here publikely preached, and also receaued in the Saxons tyme, aboue 600. yeares agoe].
  Testimony of antiquity
Pub. Info. Imprinted at London : By Iohn Day, dwelling ouer Aldersgate beneath S. Martyns, [1566?]
LOCATION CALL NO. STATUS
 Special Collections  PR1526.L6 A1 1566  LIB USE ONLY
Descript 13-40, 50-75, [14] l. ; 15 cm. (8vo)
Note Title page is handwritten by the author, the first thirteen words of the title, and the date "1567?"
  English and Anglo-Saxon on opposite pages.
  Title from title page replacement and records of other versions. Imprint from colophon.
  "Cum priuilegio regię maiestatis."
  Goucher's copy missing leaves 1-12, 41-49. L. 52 misnumbered "32," l. 65 misnumbered "64."
  Signatures: [B5]-E4, G-L4. Goucher copy begins on B5. Gathering F missing.
Contents The preface to the Christian reader -- A sermon of the paschall lamb -- The wordes of Ęlfrike, taken out of his epistle written to Wulfsine, byshop of Scyrburne --Epistle to Wulfstane -- The Lordes prayer, the creede and the x. commaundements
Note Purchase; James Wilson Bright; 1926 41949
  Bound in contemporary full calf with blind-tooling.