[January] (beginning, “I Alexander Pope to John Gay
  faithfully assure you”)
Sunday night [January] Alexander Pope to John Gay
[January] (beginning:  “I Alexander Pope to John Gay
  am glad to hear of the
  progress”)
[1][February or March] John Gay to Alexander Pope
  (beginning:  “My
  melancholy increases”)
From the Duke of John Gay to Jonathan Swift
  Queensberry’s
  in Burlington
  Gardens, March 18
Dublin, March 19 Jonathan Swift to John Gay
August 9 John Gay and the Duchess of Queensberry
                              to the Hon. Mrs. Howard
August 27 John Gay and the Duchess of Queensberry
                              to the Hon. Mrs. Howard
Middleton Stoney, John Gay to Jonathan Swift
  November 9
Dublin, November 20 Jonathan Swift to John Gay

[Footnote 1:  The authenticity of this letter is doubtful.]

1730

London, March 3 John Gay to Jonathan Swift
Dublin, March 19 Jonathan Swift to John Gay
March 31 John Gay to Jonathan Swift
May 7 John Gay to the Hon. Mrs. Howard
Amesbury, July 4 John Gay to Jonathan Swift
Twickenham, July 21 Alexander Pope to John Gay
July 31 The Hon. Mrs. Howard to John Gay
August 18 Alexander Pope to John Gay
August 20 John Gay and the Duchess of Queensberry
                              to the Hon. Mrs. Howard
August 22 The Hon. Mrs. Howard to John Gay
September 3 The Hon. Mrs. Howard to John Gay
September 11 John Gay and the Duchess of Queensberry
                               to the Hon. Mrs. Howard
September 11 Alexander Pope to John Gay
October 1 Alexander Pope to John Gay
October Alexander Pope to John Gay
October 23 Alexander Pope to John Gay
Amesbury, November 8 John Gay and the Duchess of Queensberry
                              to Jonathan Swift
Dublin, November 10 Jonathan Swift to John Gay
Dublin, November 19 Jonathan Swift to John Gay and the
                              Duchess of Queensberry
Amesbury, December 6 John Gay and the Duchess of Queensberry
                              to Jonathan Swift
December 17 John Gay and the Duchess of Queensberry
                              to Hon. Mrs. Howard

1731

Dublin, March 13 Jonathan Swift to John Gay and the
                              Duchess of Queensberry
March 20 John Gay to Dean Swift
April 21 John Gay and the Duchess of Queensbury
                             to Jonathan Swift