1Thomas Jefferson to Thomas Cooper, 13 March 1820 (Jefferson Papers)
Your letter of the 1 st came to hand the last night. 4 days before that, to wit on the 8 th I had addressed one to you; in which however I had committed an error which I must correct in the first place. it was in naming 1500 instead of 750.D. this lapse of memory occurred to me after despatching mine. on turning to yours of Oct. 25. 19. I found that the proposition made in that and acceded to...