Granville Sharp's 1803 essay "Remarks on the Uses of the Definite Article in the Greek Text of the New Testament" is available at Google Books. It is interesting not only on account of its main subject, but also because of a description of a feature in Codex A in Jude that the author was able to describe accurately only via the use of a magnifying glass and angled lighting. The description of this feature begins on p. 99 (digital page-count), which is p. 54 printed on the page.
Sharp concluded that it is merely a line of connection.
Yours in Christ,
James Snapp, Jr.