On May 29, 1787 after Edmund Randolph presented the Virginia Plan, Charles Pinckney of South Carolina also presented a draft plan for a Constitution.
For some time the validity of the Pinckney Plan was questioned, since it bore considerable resemblance to the “Committee of Detail Plan. In 1818, John Quincy Adams was preparing the journal of the convention for publication and discovered that the Pinckney plan was missing, he wrote to Pinckney for a copy, and Pinckney sent him what he asserted was either a copy of his original draft or a copy of a draft which differed from the original in no essentials. But as this was found to bear a close resemblance to the draft reported by the committee of detail, Madison and others, who had been members of the convention, as well as historians, treated it as spurious, and for years Pinckney received little credit for his work in the convention. Later historians, however, notably J. Franklin Jameson and Andrew C. McLaughlin, have accredited to him the suggestion of a number of provisions of the constitution as a result of their efforts to reconstruct his original plan chiefly from his speeches, or alleged speeches, and from certain papers of James Wilson, a member of the committee of detail, one of which papers is believed to be an outline of the Pinckney plan.
This is the plan submitted to John Quincy Adams in 1818. James Madison only notes in his notes that a plan from Charles Pinckney was in fact submitted, but the plan itself was not written down .