
Regarding using the words "slave" or "slaver" in the U.S. Constitution (25 August 1787); as quoted in "The Present Aspect of the Slavery Question" in Orations and Addresses of George William Curtis (1894), p. 69 https://books.google.com/books?id=y3RaAAAAMAAJ&pg=PA69&dq=%22We+intend+this+Constitution+to+be+the+great+charter+of+human+liberty+to+the+unborn+%22&hl=en&sa=X&ved=0CB0Q6AEwAGoVChMI2ai6jcCsxwIVRRs-Ch38_wz2#v=onepage&q=%22We%20intend%20this%20Constitution%20to%20be%20the%20great%20charter%20of%20human%20liberty%20to%20the%20unborn%20%22&f=false
1780s, The Debates in the Federal Convention (1787)