11Richard Randolph to Thomas Jefferson, 30 May 1822 (Jefferson Papers)
The six barrels of hydraulic cement were sent to you with a belief that they would answer the purpose for which it was intended, and be useful to you in the construction of your cisterns. I am sorry that you are affraid to hazard the success of it in the cistern, and request you to use them in any way that you may think proper. Perhaps you may have occasion to use it at the Mill . Maj r Gibbon...