1Thomas Jefferson to John Hollins, 20 January 1811 (Jefferson Papers)
I had delayed asking the favor of you to procure my stock of plaister expecting I should be able to find a recipe for distinguishing the good from the bad, which I thought I possessed. but hitherto I have sought for it in vain; and lest the season should be lost for getting it in time, I will ask the favor of you to send me six tons, in the lump, to the care of Mess rs Gibson & Jefferson at...