Diary of John Adams, volume 2
Captn. Callender came to breakfast with Us. Coll. Dagworthy and his Brother Captn. Dagworthy breakfasted with Us. Mrs. Yard entertained Us, with Muffins, Buck Wheat Cakes and common Toast. Buckwheat is an excellent grain, and is very plenty here.—Attended Congress from 9 to after 3.1—Rode out of Town six Miles to Mr. Hills where we dined with Mr. Hill and Lady, Mr. Dickinson and his Lady, Mr. Thompson and his Lady, old Mr. Meredith, father of Mrs. Hill, Mr. Johnson of Maryland and Mr. To Reed.
JA means that he attended the committee on stating the rights of the Colonies, not Congress. According to Samuel Ward's Diary, the committee met on the 19th, 20th, and 21st, while Congress adjourned from day to day, awaiting the committee's report (Burnett, ed., Letters of Members
, 1:36, 37).