1Thomas Boylston Adams to John Quincy Adams, 29 December 1799 (Adams Papers)
Since the date of my last letter, I have received none from you, of course I do not feel very culpable in having suffered so long an interval to elapse without writing, though, if a direct opportunity from this place had offered, I should not have neglected it. In my last, I promised to make out my Account at the commencement of the next Century, & this I intend doing, to accompany the present...