Diary of John Quincy Adams, volume 2
The day was spent in the usual uninteresting manner: indeed it may be generally observed that the more advantageously the day is employed for myself; the less I have to say at the close of it.1 I walk'd in the evening with Stacey till after nine o'clock.
JQA notes, in his line-a-day entry, Blackstone's Commentaries, which he presumably read this day (D/JQA/13, Adams Papers, Microfilms, Reel No. 16).