11Richard Randolph to Thomas Jefferson, 18 March 1822 (Jefferson Papers)
By the return of the governor s boat I have taken the liberty of sending six barrels of the waterproof cement, the materials of which, were first discovered by my father on the James , and York rivers. Previous to its use, the cement should be made moist throughout, with clean water, in which state it must remain two or three days, to give time for the lime to slack perfectly: then it must be...