SUPPLEMENT TO THE GENTLEMAN'S MAGAZINE FOR THE YEAR 1777, London.  This "supplemental" issue was published at the end of the year and continued the similar format of the monthly issues although not having a full title/index page. Although the table of contents does take the top half of the front page.
The best item in this issue is the quite lengthy letter from George Washington to his wife, dated June 24, 1776, and which begins: "You have hurt me, I know not how much, by the insinuation in your last, that my letters to you have lately been less frequent because I have felt less concern for you. The suspicion is most unjust...Have we lived, now almost a score of years, in the closest & dearest conjugal intimacy to so little purpose, that on an appearance only of inattention to you...you should pitch upon that single motive which alone is injurious to me?..." and so much more (photos show portions). 
In this very personal letter, Washington touches on a few military concerns but focuses more on the family and concerns for the operation of the homestead in Virginia. Taking nearly 2 1/2 pages it ends with: "...I beg to be affectionately remembered to all our friends & relations; and that you will continue to believe me to be your most faithful & tender husband." and is signed: G.W.
Two pages are taken up with the accounts of the British successes at Forts Mifflin & Mercer, which opened up the Delaware River to the British as far as Philadelphia. There is also an account on this event signed by: W. Howe.
Lacking the plate called for as it is erroneously called for in the December issue as well.
Complete in 30 pages, 5 by 8 1/4 inches, bit close-trimmed at the bottom of the first leaf only, nice condition.