It is well known that Westcott and Hort supplied pre-publication fascicles of their in-progress Greek New Testament to the members of the English Revision Committee during the period 1870-1881, specifically as follows (from Hort, Introduction, p. 18):
"The Gospels, with a temporary preface of 28 pages, were thus issued in July 1871, the Acts in February 1873, the Catholic Epistles in December 1873, the Pauline Epistles in February 1875, and the Apocalypse in December 1876."
These preliminary fascicles obviously were subject to comment and criticism from the Revision Committee, with the accepted and reasoned results of such being implemented into the final 1881 W-H edition. Hort notes (p. 18 once more) that "many corrections dealing with punctuation or otherwise of a minute kind, together with occasional modifications of reading, have been introduced into the stereotype plates within the last few months" prior to actual publication.
The question I have (knowing that certain of W-H's letters and papers are stored within the Cambridge University Library) is whether any of these preliminary fascicles also are part of the Cambridge collection. If so, it would seem a fascinating study for someone first to reproduce in full the text of their "temporary preface", and then to compile a collation of differences between the Greek text of the preliminary fascicles and that which actually was published.
(An added bonus would be the record of any handwritten notes that may have been placed on those fascicles by either Westcott or Hort).
Sounds like a good project for someone at Tyndale House to undertake.